// Numbas version: finer_feedback_settings
{"name": "USSJRN-45-1 - Electronics Progress Assessment (1)", "metadata": {"description": "<p>FoES Electronics Written Assessment</p>", "licence": "Creative Commons Attribution 4.0 International"}, "duration": 0, "percentPass": 0, "showQuestionGroupNames": false, "shuffleQuestionGroups": false, "showstudentname": false, "question_groups": [{"name": "Group", "pickingStrategy": "all-ordered", "pickQuestions": 1, "questionNames": ["", "", ""], "variable_overrides": [[], [], []], "questions": [{"name": "EL Q001 EM Fields, Batteries & Resistor Properties", "extensions": [], "custom_part_types": [], "resources": [["question-resources/Q001a_Point_Charge_Electric_Field.png", "/srv/numbas/media/question-resources/Q001a_Point_Charge_Electric_Field.png"], ["question-resources/Q001a_Uniform_Electric_Field.png", "/srv/numbas/media/question-resources/Q001a_Uniform_Electric_Field.png"], ["question-resources/Q001a_Uniform_Mag_Field_Away.png", "/srv/numbas/media/question-resources/Q001a_Uniform_Mag_Field_Away.png"], ["question-resources/EL_Q001cv2__IR_Series.png", "/srv/numbas/media/question-resources/EL_Q001cv2__IR_Series.png"], ["question-resources/EL_Q001bv2__V_Div__Therm_jUVOQi7.png", "/srv/numbas/media/question-resources/EL_Q001bv2__V_Div__Therm_jUVOQi7.png"]], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "contributors": [{"name": "Robert Bauld", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/19446/"}], "tags": [], "metadata": {"description": "", "licence": "Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International"}, "statement": "<h1 style=\"text-align: center;\">EM Fields, Batteries &amp; Resistor Properties</h1>", "advice": "", "rulesets": {}, "builtin_constants": {"e": true, "pi,\u03c0": true, "i": true, "j": false}, "constants": [], "variables": {"q001a_polarity": {"name": "q001a_polarity", "group": "Ungrouped variables", "definition": "[ \"positively \", \"negatively\" ]", "description": "", "templateType": "list of strings", "can_override": false}, "q001b_Therm_Co": {"name": "q001b_Therm_Co", "group": "Ungrouped variables", "definition": "random(0.005 .. 0.007#0.0002)", "description": "", "templateType": "randrange", "can_override": false}, "q001b_Vs": {"name": "q001b_Vs", "group": "Ungrouped variables", "definition": "random(3 .. 12#3)", "description": "", "templateType": "randrange", "can_override": false}, "q001b_R_0": {"name": "q001b_R_0", "group": "Ungrouped variables", "definition": "q001b_R1", "description": "", "templateType": "anything", "can_override": false}, "q001b_r1": {"name": "q001b_r1", "group": "Ungrouped variables", "definition": "random(2 .. 7#0.4)", "description": "", "templateType": "randrange", "can_override": false}, "q001cV1": {"name": "q001cV1", "group": "Ungrouped variables", "definition": "random(1.4 .. 1.6#0.05)", "description": "", "templateType": "randrange", "can_override": false}, "q001cR1": {"name": "q001cR1", "group": "Ungrouped variables", "definition": "random(8 .. 10#2)", "description": "", "templateType": "randrange", "can_override": false}, "q001cR2": {"name": "q001cR2", "group": "Ungrouped variables", "definition": "random(4 .. 7#1)", "description": "", "templateType": "randrange", "can_override": false}, "q001cV3": {"name": "q001cV3", "group": "Ungrouped variables", "definition": "random(1.1 .. 1.3#0.1)", "description": "", "templateType": "randrange", "can_override": false}, "q001cRL": {"name": "q001cRL", "group": "Ungrouped variables", "definition": "random(100 .. 500#100)", "description": "", "templateType": "randrange", "can_override": false}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": ["q001a_polarity", "q001b_Therm_Co", "q001b_Vs", "q001b_R_0", "q001b_r1", "q001cV1", "q001cR1", "q001cR2", "q001cV3", "q001cRL"], "variable_groups": [], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "information", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "<p><strong>Part a.&nbsp; Electric &amp; Magnetic Fields</strong></p>\n<p><strong></strong></p>\n<p>i. The diagram below shows two equal and opposite charged particles with the field lines between them.<strong></strong></p>\n<p><img src=\"resources/question-resources/Q001a_Point_Charge_Electric_Field.png\" width=\"328\" height=\"235\" style=\"display: block; margin-left: auto; margin-right: auto;\"/></p>\n<p>Indicate on the diagram the direction the Electric Field.</p>\n<p>ii. The diagram shows two charged plates and a near uniform field between them. An electrically negative charged particle travels between the two plates.&nbsp;</p>\n<p><img src=\"resources/question-resources/Q001a_Uniform_Electric_Field.png\" width=\"467\" height=\"220\" style=\"display: block; margin-left: auto; margin-right: auto;\"/></p>\n<p>Plot the expected trajectory of the charged particle.</p>\n<p></p>\n<p>iii.&nbsp; The diagram shows an electrically negative charged particle entering a uniform magnetic field.</p>\n<p><img src=\"resources/question-resources/Q001a_Uniform_Mag_Field_Away.png\" width=\"405\" height=\"331\" style=\"display: block; margin-left: auto; margin-right: auto;\"/></p>\n<p>Using Fleming's left hand rule, plot the expected trajectory of the charged particle.<strong></strong></p>\n<p><strong>[4 Marks]</strong></p>\n<p></p>"}, {"type": "information", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "<p><strong>Part b. Voltage Divider</strong></p>\n<p>A voltage divider uses a thermistor (temperature coefficient &alpha; = {q001b_Therm_Co} /&deg;C) to measure a range of temperatures.&nbsp;</p>\n<p><img src=\"resources/question-resources/EL_Q001bv2__V_Div__Therm_jUVOQi7.png\" width=\"797\" height=\"296\" style=\"display: block; margin-left: auto; margin-right: auto;\"/></p>\n<p>V<sub>S</sub> = {q001b_Vs}V, R<sub>1</sub> = {q001b_R1}M&Omega;, R<sub>0</sub> = {q001b_R_0}M&Omega;</p>\n<ul>\n<li>Calculate the resistance (R<sub>Th</sub>) of the thermistor at 35&deg;C.</li>\n<li>Calculate/determine the reading of <strong>V<sub>OUT</sub> </strong>at 35&deg;C.</li>\n<li>Calculate the power consumed by the circuit at 35&deg;C</li>\n</ul>\n<p>&nbsp;</p>\n<ul>\n<li>Calculate the resistance (R<sub>Th</sub>) of the thermistor at 0&deg;C.</li>\n<li>Calculate/determine the reading of <strong>V<sub>OUT</sub> </strong>for at 0&deg;C.</li>\n<li>Calculate the power consumed by the circuit at 0&deg;C</li>\n</ul>\n<p>SPICE circuit suitable for analysis: <a href=\"https://www.multisim.com/content/d9sEYo86oJ45pR2CHzUkxU/foesq001bv2-1/open/\" target=\"_blank\" rel=\"noopener\">FoESQ001b.v2 (1)</a></p>\n<p></p>\n<p><strong>[6 Marks]</strong></p>"}, {"type": "information", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "<p><strong>Part c. Internal Resistance</strong></p>\n<p>The diagram shows the arrangement for testing the internal resistance of a battery.</p>\n<ul>\n<li>What is the cause of internal resistance in batteries and what factors can influence it.</li>\n<li>Describe how the internal resistance of a battery can be determined using the configuration shown.</li>\n<li>What is the significance if the internal resistance of the battery increases or decreases over time, what complications can arise and what action should be taken.</li>\n</ul>\n<p><img src=\"resources/question-resources/EL_Q001cv2__IR_Series.png\" width=\"713\" height=\"342\" style=\"display: block; margin-left: auto; margin-right: auto;\"/></p>\n<p>V<sub>1 </sub>= {q001cV1}V, R<sub>1</sub>= {q001cR1}&Omega;</p>\n<p>V<sub>2&nbsp;</sub>= {q001cV1}V, R<sub>2</sub>= {q001cR2}&Omega;</p>\n<p>V<sub>3 </sub>= {q001cV3}V, R<sub>3</sub>= {q001cR1}&Omega;</p>\n<p>V<sub>4 </sub>= { q001cV1}V,&nbsp;R<sub>4</sub>= { q001cR1}&Omega;</p>\n<p>R<sub>L</sub>= {q001cRL}&Omega;</p>\n<p>For the values given, analyse the battery network supplying a load (R<sub>L</sub>) with the internal resistances shown. Ensure that you:</p>\n<ul>\n<li>Explain what is wrong with the circuit and how does the error affect the performance of the network?</li>\n<li>Compare how much power is being consumed in the circuit versus what is being supplied to the load?</li>\n</ul>\n<p>SPICE circuit suitable for analysis: <a href=\"https://www.multisim.com/content/dbdsUrnKmmyvuFng8orQBH/foes-q001c/open/\">FoES Q001c</a></p>\n<p><strong>[10 Marks]</strong></p>\n<p></p>\n<p></p>"}], "partsMode": "all", "maxMarks": 0, "objectives": [], "penalties": [], "objectiveVisibility": "always", "penaltyVisibility": "always"}, {"name": "EL Q002 Capacitors, Inductors & Step Response", "extensions": [], "custom_part_types": [], "resources": [["question-resources/SbE_CC1_Q4b.png", "/srv/numbas/media/question-resources/SbE_CC1_Q4b.png"], ["question-resources/EL_Q002c_-_Capacitor_Charge-Discharge.png", "/srv/numbas/media/question-resources/EL_Q002c_-_Capacitor_Charge-Discharge.png"], ["question-resources/EL_Q002a.v2_-_RC_Circuit.png", "/srv/numbas/media/question-resources/EL_Q002a.v2_-_RC_Circuit.png"]], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "contributors": [{"name": "Robert Bauld", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/19446/"}], "tags": [], "metadata": {"description": "<p>Question covering Capacitors, Inductors &amp; Step Response</p>", "licence": "All rights reserved"}, "statement": "<h1 style=\"text-align: center;\">Capacitors, Inductors &amp; Step Response</h1>", "advice": "<p>See Spreadsheet</p>", "rulesets": {}, "builtin_constants": {"e": true, "pi,\u03c0": true, "i": true, "j": false}, "constants": [], "variables": {"Q002b_L1": {"name": "Q002b_L1", "group": "EL Q002b", "definition": "random(0.05 .. 0.05#1)", "description": "<p>Solenoid Inductace (L<sub>1</sub>)</p>", "templateType": "randrange", "can_override": true}, "Q002b_R1": {"name": "Q002b_R1", "group": "EL Q002b", "definition": "random(1 .. 2#0.2)", "description": "<p>Solenoid Resistance (&Omega;)</p>", "templateType": "randrange", "can_override": false}, "Q002b_Solenoid_length": {"name": "Q002b_Solenoid_length", "group": "EL Q002b", "definition": "random(10 .. 10#1)", "description": "<p>The length (<em>l </em>) of the solenoid in mm</p>", "templateType": "randrange", "can_override": false}, "Q002b_Armature_Gap": {"name": "Q002b_Armature_Gap", "group": "EL Q002b", "definition": "random(2 .. 2#1)", "description": "<p>the gap (g) between the solenoid and the armature in mm&nbsp;</p>", "templateType": "randrange", "can_override": false}, "Q002b_F_gen": {"name": "Q002b_F_gen", "group": "EL Q002b", "definition": "random(2.3 .. 2.3#1)", "description": "<p>Force (F) generated by the solenoid in N</p>", "templateType": "randrange", "can_override": false}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": [], "variable_groups": [{"name": "EL Q4a", "variables": []}, {"name": "EL Q002b", "variables": ["Q002b_L1", "Q002b_R1", "Q002b_Solenoid_length", "Q002b_Armature_Gap", "Q002b_F_gen"]}], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "information", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "<p><strong>Part a. Capacitor Properties</strong></p>\n<p>The diagram shows a capacitor and resistor in a Series DC circuit.&nbsp;</p>\n<p><img src=\"resources/question-resources/EL_Q002a.v2_-_RC_Circuit.png\" width=\"878\" height=\"362\"/></p>\n<ul>\n<li>State the function of a capacitor in a DC circuit.</li>\n<li>State the equation that relates the physical parameters of the capacitor.</li>\n<li>Give a definition of the time constant for this circuit.</li>\n</ul>\n<p><strong>[4 Marks]</strong></p>"}, {"type": "information", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "<p><strong>Part b) Solenoid Calculation</strong></p>\n<p>The figure shows a solenoid electromagnet circuit compromising the inductance of the coil and the series resistance.&nbsp; It is being energised by a battery.&nbsp; The switch has been closed for {100*Q002b_L1*Q002b_R1}s.&nbsp;</p>\n<p><img src=\"resources/question-resources/SbE_CC1_Q4b.png\" alt=\"Solenoid Circuit &amp; Equations\" width=\"598\" height=\"405\" style=\"display: block; margin-left: auto; margin-right: auto;\"/></p>\n<p>The measured Inductance (<em>L</em>) of the solenoid is {siground(dec(Q002b_L1*1000),4)}mH and the Resistance is {Q002b_R1}&Omega;.&nbsp; The length (<em>l </em>) of the solenoid is {Q002b_Solenoid_length}mm and the gap (g) between the solenoid and the armature is {Q002b_Armature_Gap}mm.</p>\n<ul>\n<li>What is the current flowing in the inductor to generate a force of {Q002b_F_gen}N?</li>\n<li>For this current, what is the magnitude of the supply voltage V<sub>S</sub>?</li>\n</ul>\n<p><strong>SPICE circuit suitable for analysis: <a href=\"https://www.multisim.com/content/ZuzqgJDNgXqNmpNiGf6euc/foes-el-q002b/open/\" target=\"_blank\" rel=\"noopener\">FoES El Q002b</a></strong></p>\n<p><strong>[6Marks]</strong></p>\n<p></p>\n<p></p>"}, {"type": "information", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "<p><strong>Part c. Step Response</strong></p>\n<p>The circuit shows a Resistor and Capacitor Network as well as the charge/discharge plots of the Capacitor when the switch is closed and opened.</p>\n<p><img src=\"resources/question-resources/EL_Q002c_-_Capacitor_Charge-Discharge.png\" width=\"1524\" height=\"469\"/></p>\n<p>V<sub>S</sub> = {5} V, V<sub>B</sub> = {2.5} V t<sub>ON </sub>={50} ms, t<sub>OFF </sub>={200} ms C<sub>1</sub> ={10} &mu;F , R<sub>1</sub> = {10} k&Omega;, R<sub>2</sub> = {2} k&Omega;</p>\n<p>&nbsp;</p>\n<p>Explain what is happening in the circuit.&nbsp; What is the relationship between the voltage across and current through the Capacitor.</p>\n<p>SPICE circuit suitable for analysis: <a href=\"https://www.multisim.com/content/9rW4rVU7peuxbZD6f2JvAk/foes-q002c/open/\" target=\"_blank\" rel=\"noopener\">FoES Q002c</a></p>\n<p><strong>[10 Marks]</strong></p>\n<p></p>\n<p></p>\n<p></p>"}, {"type": "extension", "useCustomName": false, "customName": "", "marks": 1, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null}], "partsMode": "all", "maxMarks": 0, "objectives": [], "penalties": [], "objectiveVisibility": "always", "penaltyVisibility": "always"}, {"name": "EL Q003 - Power & Frequency Response ", "extensions": [], "custom_part_types": [], "resources": [["question-resources/SbE_CC1_Q3ai.png", "/srv/numbas/media/question-resources/SbE_CC1_Q3ai.png"], ["question-resources/SbE_CC1_Q3b.png", "/srv/numbas/media/question-resources/SbE_CC1_Q3b.png"], ["question-resources/SbE_CC1_Q3d.png", "/srv/numbas/media/question-resources/SbE_CC1_Q3d.png"], ["question-resources/SbE_CC1_Q3c.png", "/srv/numbas/media/question-resources/SbE_CC1_Q3c.png"], ["question-resources/EL_Q003b_-_RLC_Power.png", "/srv/numbas/media/question-resources/EL_Q003b_-_RLC_Power.png"], ["question-resources/EL_Q003c_-_RLC_Series_Resonance.png", "/srv/numbas/media/question-resources/EL_Q003c_-_RLC_Series_Resonance.png"]], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "contributors": [{"name": "Robert Bauld", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/19446/"}], "tags": [], "metadata": {"description": "<p>Question Covering AC power and frquency response</p>", "licence": "All rights reserved"}, "statement": "<h2 style=\"text-align: center;\">Power &amp; Frequency Response</h2>", "advice": "<p>see spread sheet</p>", "rulesets": {}, "builtin_constants": {"e": true, "pi,\u03c0": true, "i": true, "j": false}, "constants": [], "variables": {"Q3ai_f_S": {"name": "Q3ai_f_S", "group": "Q3a", "definition": "random(100 .. 150#10)", "description": "<p>Frequency (f<sub>s</sub>)</p>", "templateType": "randrange", "can_override": false}, "Q3ai_V_PP": {"name": "Q3ai_V_PP", "group": "Q3a", "definition": "random(5 .. 9#1)", "description": "<p>V<sub>P-P</sub></p>", "templateType": "randrange", "can_override": false}, "Q3ai_V_DC": {"name": "Q3ai_V_DC", "group": "Q3a", "definition": "random(0 .. 0#0)", "description": "<p style=\"text-align: left;\">DC Offset</p>", "templateType": "randrange", "can_override": false}, "Q3ai_R_L": {"name": "Q3ai_R_L", "group": "Q3a", "definition": "random(50 .. 150#10)", "description": "<p>Load Resistor R<sub>L</sub></p>", "templateType": "randrange", "can_override": false}, "q3aii_f_s": {"name": "q3aii_f_s", "group": "Q3a", "definition": "random(33 .. 99#33)", "description": "<p>Frequency (f<sub>s</sub>)</p>", "templateType": "randrange", "can_override": false}, "q3aii_v_pp": {"name": "q3aii_v_pp", "group": "Q3a", "definition": "random(5 .. 5#1)", "description": "<p>V<sub>P-P</sub></p>", "templateType": "randrange", "can_override": false}, "Q3aii_R_L": {"name": "Q3aii_R_L", "group": "Q3a", "definition": "random(2000 .. 2000#1)", "description": "<p>R<sub>L</sub></p>", "templateType": "randrange", "can_override": false}, "Q3aii_t_rise": {"name": "Q3aii_t_rise", "group": "Q3a", "definition": "siground(dec(1/(Q3aii_t_rise_modifier*q3aii_f_s)),4)", "description": "", "templateType": "anything", "can_override": false}, "Q3aii_t_rise_modifier": {"name": "Q3aii_t_rise_modifier", "group": "Q3a", "definition": "random(3 .. 4#1)", "description": "<p>Modifier of t_rise</p>", "templateType": "randrange", "can_override": false}, "Q3aii_V_DC": {"name": "Q3aii_V_DC", "group": "Q3a", "definition": "random(1 .. 1#1)", "description": "<p>DC Offset</p>", "templateType": "randrange", "can_override": false}, "Q3b_R1": {"name": "Q3b_R1", "group": "Q3b", "definition": "random(10 .. 18#2)", "description": "", "templateType": "randrange", "can_override": false}, "Q3b_R2": {"name": "Q3b_R2", "group": "Q3b", "definition": "random(90 .. 120#10)", "description": "", "templateType": "randrange", "can_override": false}, "Q3b_R3": {"name": "Q3b_R3", "group": "Q3b", "definition": "Q3b_R2", "description": "", "templateType": "anything", "can_override": false}, "Q3b_R4": {"name": "Q3b_R4", "group": "Q3b", "definition": "q3b_r2", "description": "", "templateType": "anything", "can_override": false}, "Q3b_VS": {"name": "Q3b_VS", "group": "Q3b", "definition": "random(12 .. 12#1)", "description": "", "templateType": "randrange", "can_override": false}, "Q3c_R_L": {"name": "Q3c_R_L", "group": "Q3d", "definition": "random(1 .. 3#1)", "description": "<p>Load Resistance (k&Omega;)</p>", "templateType": "randrange", "can_override": false}, "Q3c_C1": {"name": "Q3c_C1", "group": "Q3d", "definition": "random(1 .. 3#1)", "description": "<p>Smoothing Capacitor (uF)</p>", "templateType": "randrange", "can_override": false}, "Q3c_V_S": {"name": "Q3c_V_S", "group": "Q3d", "definition": "random(20 .. 23#1)", "description": "<p>Supply Voltage (V<sub>S</sub>)</p>", "templateType": "randrange", "can_override": true}, "Q3c_Z_BDV": {"name": "Q3c_Z_BDV", "group": "Q3d", "definition": "siground(dec(q3c_v_s*(3/20)),2)", "description": "<p>Zener Diode Reverse Breakdown Voltage (V)</p>", "templateType": "anything", "can_override": false}, "Q3d_C1": {"name": "Q3d_C1", "group": "Q4d", "definition": "random(10 .. 12#0.1)", "description": "<p>Capacitance C1</p>", "templateType": "randrange", "can_override": false}, "Q3d_L1": {"name": "Q3d_L1", "group": "Q4d", "definition": "random(170 .. 190#10)", "description": "<p>Inductance</p>", "templateType": "randrange", "can_override": false}, "Q3d_R_L": {"name": "Q3d_R_L", "group": "Q4d", "definition": "random(1 .. 5#4)", "description": "", "templateType": "randrange", "can_override": false}, "Q3d_V_S": {"name": "Q3d_V_S", "group": "Q4d", "definition": "random(1 .. 10#9)", "description": "", "templateType": "randrange", "can_override": false}, "Q3ai_DutyCycle": {"name": "Q3ai_DutyCycle", "group": "Q3a", "definition": "random(0.2 .. 0.6#0.1)", "description": "", "templateType": "randrange", "can_override": false}, "Q3b_R5": {"name": "Q3b_R5", "group": "Q3b", "definition": "Q3b_R1", "description": "", "templateType": "anything", "can_override": false}, "Q003b_L": {"name": "Q003b_L", "group": "Q3b", "definition": "random(0.1 .. 0.2#30)", "description": "", "templateType": "randrange", "can_override": false}, "Q003b_C": {"name": "Q003b_C", "group": "Q3b", "definition": "random(40 .. 75#15)", "description": "", "templateType": "randrange", "can_override": false}}, "variablesTest": {"condition": "", "maxRuns": 100}, "ungrouped_variables": [], "variable_groups": [{"name": "Q3b", "variables": ["Q3b_VS", "Q3b_R1", "Q3b_R2", "Q3b_R3", "Q3b_R4", "Q3b_R5", "Q003b_L", "Q003b_C"]}, {"name": "Q3a", "variables": ["Q3ai_f_S", "Q3ai_R_L", "Q3ai_V_DC", "Q3ai_V_PP", "Q3ai_DutyCycle", "q3aii_f_s", "Q3aii_R_L", "Q3aii_t_rise", "Q3aii_t_rise_modifier", "Q3aii_V_DC", "q3aii_v_pp"]}, {"name": "Q3d", "variables": ["Q3c_R_L", "Q3c_C1", "Q3c_V_S", "Q3c_Z_BDV"]}, {"name": "Q4d", "variables": ["Q3d_C1", "Q3d_V_S", "Q3d_L1", "Q3d_R_L"]}], "functions": {}, "preamble": {"js": "", "css": ""}, "parts": [{"type": "information", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "<p><strong>Part a) Signal Waveforms</strong></p>\n<p>Draw or derive the voltage and current wave forms for the following:</p>\n<table width=\"919\" height=\"317\" style=\"height: 472px; width: 634px; border-style: solid; border-color: #000000;\">\n<tbody>\n<tr style=\"height: 33px; background-color: #c2c0c0; text-align: center;\">\n<td style=\"width: 84.25px; height: 33px; border-style: solid; border-color: #000000; background-color: #b5b5b5; vertical-align: middle; text-align: center;\">Waveform</td>\n<td style=\"width: 206.458px; height: 33px; border-style: solid; border-color: #000000; background-color: #b5b5b5; vertical-align: middle; text-align: center;\">\n<p>Varibles</p>\n</td>\n<td style=\"width: 292.958px; height: 33px; border-style: solid; border-color: #000000; background-color: #b5b5b5; vertical-align: middle; text-align: center;\">\n<p>Circuit</p>\n</td>\n</tr>\n<tr style=\"height: 247px;\">\n<td style=\"width: 84.25px; height: 247px; border-style: solid; border-color: #000000; text-align: left;\">i. Pulsed DC&nbsp;</td>\n<td style=\"width: 206.458px; height: 247px; border-style: solid; border-color: #000000; text-align: left;\">\n<p>R<sub>L</sub>: {Q3ai_R_L} &Omega;</p>\n<p>Frequency (f<sub>s</sub>): {Q3ai_F_S} Hz</p>\n<p>V<sub>P-P: </sub>{Q3ai_V_PP} V</p>\n<p>DC Offset (V<sub>DC</sub>): {Q3ai_V_DC} V</p>\n<p>Duty Cycle: {Q3ai_DutyCycle*100}%</p>\n</td>\n<td style=\"width: 292.958px; height: 247px; border-style: solid; border-color: #000000; text-align: center;\">\n<p></p>\n<p><img src=\"resources/question-resources/SbE_CC1_Q3ai.png\" alt=\"Simple Resistive Circuit\" width=\"221\" height=\"174\" style=\"display: block; margin-left: auto; margin-right: auto;\"/></p>\n</td>\n</tr>\n<tr style=\"height: 192px;\">\n<td style=\"width: 84.25px; border-style: solid; border-color: #000000; height: 192px; text-align: left;\">ii. Triangular</td>\n<td style=\"width: 206.458px; border-style: solid; border-color: #000000; height: 192px; text-align: left;\">\n<p>R<sub>L</sub>: {Q3aii_R_L/1000} k&Omega;</p>\n<p>Frequency (f<sub>s</sub>): {Q3aii_F_S} Hz</p>\n<p>V<sub>P-P: </sub>{Q3aii_V_PP} V</p>\n<p>DC Offset (V<sub>DC</sub>): {Q3aii_V_DC} V</p>\n<p>t<sub>Rise</sub>: {Q3aii_t_rise*1000} ms</p>\n</td>\n<td style=\"width: 292.958px; border-style: solid; border-color: #000000; height: 192px; text-align: center;\">\n<p style=\"text-align: center;\"><img src=\"resources/question-resources/SbE_CC1_Q3ai.png\" alt=\"Simple Resistive Circuit\" width=\"220\" height=\"173\"/></p>\n</td>\n</tr>\n</tbody>\n</table>\n<p></p>\n<p>SPICE Circuit suitable for analysis: <a href=\"https://www.multisim.com/content/ikPbQP4ytYpNjz7h36krbQ/foes-q003a/open/\">FoES Q003a</a></p>\n<p></p>\n<p><strong>[4 Marks]</strong></p>"}, {"type": "information", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "<p><strong>Part b) Power Calculation</strong></p>\n<p>The figure shows a resistor, Inductor and Capacitor Network connected to a Sinusoidal Waveform:</p>\n<p><img src=\"resources/question-resources/EL_Q003b_-_RLC_Power.png\" width=\"688\" height=\"420\"/></p>\n<p><strong>Circuit Varibles:</strong>&nbsp;</p>\n<p>V<sub>S(peak)</sub> = {Q3b_VS}V, f = {100}Hz</p>\n<p>R<sub>1 </sub>&amp; R<sub>5</sub> = {Q3b_R1}k&Omega;,</p>\n<p>R<sub>2</sub>, R<sub>3</sub> &amp; R<sub>4</sub>= {Q3b_R2}k&Omega;,</p>\n<p>L<sub>1</sub>, L<sub>2</sub> &amp; L<sub>3</sub> = {Q003b_L}mH</p>\n<p>C<sub>1</sub>, C<sub>2</sub> &amp; C<sub>3 </sub>= {Q003b_C}&mu;F</p>\n<p>For the values given, calculate or determine the RMS power dissipated in the whole circuit and resistor R&shy;<sub>3</sub>.&nbsp;</p>\n<p>SPICE Circuit Suitable for Analysis: <a href=\"https://www.multisim.com/content/eMr29rRrBWzVqmZgmNUDbF/foes-el-q003b/open/\">FoES El Q003b</a></p>\n<p><strong>[6 Marks]</strong></p>\n<p></p>"}, {"type": "information", "useCustomName": false, "customName": "", "marks": 0, "scripts": {}, "customMarkingAlgorithm": "", "extendBaseMarkingAlgorithm": true, "unitTests": [], "showCorrectAnswer": true, "showFeedbackIcon": true, "variableReplacements": [], "variableReplacementStrategy": "originalfirst", "nextParts": [], "suggestGoingBack": false, "adaptiveMarkingPenalty": 0, "exploreObjective": null, "prompt": "<p><strong>Part c) Frequency Response</strong></p>\n<p>The circuit shown has a Capacitor, Inductor and Resistor in series which has been designed to be in resonance at a known frequency.&nbsp; The signal is measured across the load (R<sub>L</sub>).</p>\n<p style=\"text-align: center;\"><img src=\"resources/question-resources/EL_Q003c_-_RLC_Series_Resonance.png\" width=\"425\" height=\"275\"/></p>\n<p style=\"text-align: center;\"></p>\n<p style=\"text-align: left;\"><strong>Circuit Varibles:</strong> V<sub>S</sub> = {Q3d_V_S}V<sub>(RMS) </sub>, R<sub>L</sub> = {Q3d_R_L} k&Omega;<sub> </sub>C<sub>1</sub> = {Q3d_C1}&mu;F L<sub>1 </sub>= {Q3d_L1} mH</p>\n<p style=\"text-align: left;\">Using calculation or simulation, evaluate the performance of the circuit in a frequency range from 1Hz to 10kHz.&nbsp; Ensure that you:</p>\n<ul>\n<li>Explain what is meant by the term resonance and what role does it play in the circuit.</li>\n<li>Calculate or determine the frequency that the circuit will be in resonance.</li>\n<li>Plot and discuss the voltage relationship across the capacitor/inductor and the voltage across the load (R<sub>L</sub>).</li>\n<li>Discuss what application this type of circuit is useful for.</li>\n</ul>\n<p>SPICE Circuit Suitable for Analysis: <a href=\"https://www.multisim.com/content/5reFbBYMBXEiN65FTKuD6t/foes-el-q003c/open/\" target=\"_blank\" rel=\"noopener\">FoES EL Q003c</a><a href=\"https://www.multisim.com/create/\" target=\"_blank\" rel=\"noopener\"></a><strong></strong></p>"}], "partsMode": "all", "maxMarks": 0, "objectives": [], "penalties": [], "objectiveVisibility": "always", "penaltyVisibility": "always"}]}], "allowPrinting": true, "navigation": {"allowregen": false, "reverse": false, "browse": false, "allowsteps": false, "showfrontpage": false, "navigatemode": "sequence", "onleave": {"action": "none", "message": ""}, "preventleave": false, "typeendtoleave": false, "startpassword": "", "autoSubmit": true, "allowAttemptDownload": false, "downloadEncryptionKey": "", "showresultspage": "never"}, "timing": {"allowPause": true, "timeout": {"action": "none", "message": ""}, "timedwarning": {"action": "none", "message": ""}}, "feedback": {"enterreviewmodeimmediately": false, "showactualmarkwhen": "never", "showtotalmarkwhen": "never", "showanswerstatewhen": "never", "showpartfeedbackmessageswhen": "never", "showexpectedanswerswhen": "never", "showadvicewhen": "never", "allowrevealanswer": false, "intro": "<h2><span style=\"text-decoration: underline;\">Electronics Written Assessment Instructions</span></h2>\n<p></p>\n<ul>\n<li>Ensure you have typed your UWE Candidate No. into the Sheet ID.&nbsp;</li>\n<li>If you have forgotten to type you UWE Candidate No. in, click the \"generate different sheets\" button and type the number into the \"start with ID box\"</li>\n<li>Please tick the \"page break between questions\" radio button.</li>\n<li>Click the \"print this sheet button\" to generate a pdf of the paper (with your UWE Candidate NO. on).</li>\n<li>For your submission, you will need to submit the pdf of this paper and a copies of your answer sheets.&nbsp;&nbsp;</li>\n</ul>\n<p></p>\n<ul>\n<li>You have until the submission window closes&nbsp; to submit your answers.&nbsp;</li>\n<li>Refer to the guidance document for more detail on the Assessment.</li>\n<li>Candidates should answer 1 out of the 3 questions &nbsp;</li>\n</ul>\n<p>&nbsp;</p>\n<p>Ver 1.1</p>", "end_message": "", "results_options": {"printquestions": true, "printadvice": true}, "feedbackmessages": [], "reviewshowexpectedanswer": false, "showanswerstate": false, "reviewshowfeedback": false, "showactualmark": false, "showtotalmark": false, "reviewshowscore": false, "reviewshowadvice": false}, "diagnostic": {"knowledge_graph": {"topics": [], "learning_objectives": []}, "script": "diagnosys", "customScript": ""}, "contributors": [{"name": "Robert Bauld", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/19446/"}], "extensions": [], "custom_part_types": [], "resources": [["question-resources/Q001a_Point_Charge_Electric_Field.png", "/srv/numbas/media/question-resources/Q001a_Point_Charge_Electric_Field.png"], ["question-resources/Q001a_Uniform_Electric_Field.png", "/srv/numbas/media/question-resources/Q001a_Uniform_Electric_Field.png"], ["question-resources/Q001a_Uniform_Mag_Field_Away.png", "/srv/numbas/media/question-resources/Q001a_Uniform_Mag_Field_Away.png"], ["question-resources/EL_Q001cv2__IR_Series.png", "/srv/numbas/media/question-resources/EL_Q001cv2__IR_Series.png"], ["question-resources/EL_Q001bv2__V_Div__Therm_jUVOQi7.png", "/srv/numbas/media/question-resources/EL_Q001bv2__V_Div__Therm_jUVOQi7.png"], ["question-resources/SbE_CC1_Q4b.png", "/srv/numbas/media/question-resources/SbE_CC1_Q4b.png"], ["question-resources/EL_Q002c_-_Capacitor_Charge-Discharge.png", "/srv/numbas/media/question-resources/EL_Q002c_-_Capacitor_Charge-Discharge.png"], ["question-resources/EL_Q002a.v2_-_RC_Circuit.png", "/srv/numbas/media/question-resources/EL_Q002a.v2_-_RC_Circuit.png"], ["question-resources/SbE_CC1_Q3ai.png", "/srv/numbas/media/question-resources/SbE_CC1_Q3ai.png"], ["question-resources/SbE_CC1_Q3b.png", "/srv/numbas/media/question-resources/SbE_CC1_Q3b.png"], ["question-resources/SbE_CC1_Q3d.png", "/srv/numbas/media/question-resources/SbE_CC1_Q3d.png"], ["question-resources/SbE_CC1_Q3c.png", "/srv/numbas/media/question-resources/SbE_CC1_Q3c.png"], ["question-resources/EL_Q003b_-_RLC_Power.png", "/srv/numbas/media/question-resources/EL_Q003b_-_RLC_Power.png"], ["question-resources/EL_Q003c_-_RLC_Series_Resonance.png", "/srv/numbas/media/question-resources/EL_Q003c_-_RLC_Series_Resonance.png"]]}