// Numbas version: finer_feedback_settings {"name": "El Q005 - Rectification & Regulation - Randomised Variables Only", "extensions": [], "custom_part_types": [], "resources": [["question-resources/FoESELQ05_-_DC_power_supply.png", "/srv/numbas/media/question-resources/FoESELQ05_-_DC_power_supply.png"], ["question-resources/FoESELQ05_-_Rectifier_Devices.PNG", "/srv/numbas/media/question-resources/FoESELQ05_-_Rectifier_Devices.PNG"], ["question-resources/FoESELQ05_-_Transformer.PNG", "/srv/numbas/media/question-resources/FoESELQ05_-_Transformer.PNG"]], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"name": "El Q005 - Rectification & Regulation - Randomised Variables Only", "tags": [], "metadata": {"description": "

Question Covering AC power and frquency response

", "licence": "All rights reserved"}, "statement": "

Rectification & Regulation

", "advice": "

see spread sheet

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Load Resistance (kΩ)

", "templateType": "randrange", "can_override": false}, "Q5c_C1": {"name": "Q5c_C1", "group": "Q5c", "definition": "random(1 .. 3#1)", "description": "

Smoothing Capacitor (uF)

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Supply Voltage (VS)

", "templateType": "randrange", "can_override": true}, "Q5c_Z_BDV": {"name": "Q5c_Z_BDV", "group": "Q5c", "definition": "siground(dec(q5c_v_s*(3/20)),2)", "description": "

Zener Diode Reverse Breakdown Voltage (V)

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Part a) Rectification Devices

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Name and state the operating principles of the two rectification devices shown. 

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SPICE Circuit(s) suitable for analysis FoES Q005a

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[4Marks]

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Part b) Transformer Calculation

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The circuit shown in the figure below shows an ideal transformer connected to a purely resistive load. 

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Transformer: Turns on Primary (NP)={Q5b_N_prim}, Turns on Secondary (NS)= {Q5b_N_sec}

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Power Dissipated in RL (Pavg) = {Q5b_P_R_L}W, VP(RMS) = {230}V

\n\n

SPICE Circuit Suitable for Analysis: FoESElQ05b

\n

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[6Marks]

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Part c) Power Supply

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The figure shows a circuit designed for Voltage Reduction, Rectification and Regulation of an AC power source. 

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Circuit Variables: VS = {Q5c_V_S}VRMS; C1 = {Q5c_C1}mF; R1={1}Ω; RL = {Q5c_R_L}kΩ; T1: Turns on Primary Winding,  NP = 20 and Secondary NS = 9;  Diodes D1 & D2, Forward Bias Voltage = 860mV; Diode Z1, Reverse Breakdown Voltage = {Q5c_Z_BDV}V.  

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For the component values given, explain how the circuit operates.  Ensure that you:

\n\n

SPICE Circuit Suitable for Analysis: FoESElQ5c

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[10 Marks]

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