EDC Model Question Paper Part B – 2 Marks
21. What is a rectifier?
A rectifier is an electronic circuit that converts alternating current (AC) into direct current (DC) using diodes.
22. List any two applications of clipper circuits.
• Wave-shaping in communication systems.
• Protection of transistor input circuits from high voltage peaks.
23. Mention the need for transistor biasing.
To set a stable operating point (Q-point) for proper transistor operation and to avoid distortion in amplification.
24. List any two transistor configurations and their applications.
• Common Emitter (CE): Used for voltage amplification.
• Common Collector (CC): Used for impedance matching.
25. Define the term frequency response in amplifiers.
Frequency response is the variation of amplifier gain with frequency; it shows how gain remains constant over a range of frequencies.
26. List any two advantages of negative feedback.
• Reduces distortion and noise.
• Stabilizes gain and increases bandwidth.
27. Mention any two applications of JFET.
• Used as a voltage-controlled resistor and amplifier.
• Used as a buffer or mixer in communication circuits.
28. Write a short note on MOSFET operation.
MOSFET is a voltage-controlled device with an insulated gate.
In Enhancement Mode, it conducts when VGS exceeds threshold voltage; in Depletion Mode, it conducts at VGS = 0 and reduces current for negative VGS.
Tamil – Part B – 2 Marks Each
21. What is a rectifier?
Rectifier என்பது AC (Alternating Current) ஐ DC (Direct Current) ஆக convert செய்யும் circuit ஆகும்.
இதற்கு diode use பண்ணப்படுகிறது.
22. List any two applications of clipper circuits.
• Communication systems இல் wave shaping க்காக use பண்ணப்படுகிறது.
• High voltage peaks இல் transistor input protect பண்ண use பண்ணப்படுகிறது.
23. Mention the need for transistor biasing.
Transistor biasing நால் stable operating point (Q-point) set பண்ண முடியும்.
இதனால் signal distortion இல்லாமல் proper amplification கிடைக்கும்.
24. List any two transistor configurations and their applications.
• Common Emitter (CE): Voltage amplification க்காக use பண்ணப்படுகிறது.
• Common Collector (CC): Impedance matching க்காக use பண்ணப்படுகிறது.
25. Define the term frequency response in amplifiers.
Frequency response என்பது amplifier gain frequency க்கு எப்படி change ஆகிறது என்பதை காட்டும் graph ஆகும்.
Gain constant ஆக இருக்கும் range frequency bandwidth ஆகும்.
26. List any two advantages of negative feedback.
• Distortion அல்லது noise குறைக்கும்.
• Gain stable ஆகும் மேலும் bandwidth increase ஆகும்.
27. Mention any two applications of JFET.
• Voltage-controlled resistor ஆக use பண்ணப்படுகிறது.
• Buffer அல்லது mixer circuit இல் communication systems க்காக use பண்ணப்படுகிறது.
28. Write a short note on MOSFET operation.
MOSFET (Metal-Oxide-Semiconductor FET) ஒரு voltage-controlled device.
Gate insulated ஆக இருக்கும்.
Enhancement Mode இல் VGS threshold voltage ஐ மீறும்போது conduct செய்கிறது;
Depletion Mode இல் VGS = 0 ஆக இருந்தாலும் conduct செய்து negative VGS இல் current குறைக்கும்.