MCQs

The beta DC βDC of a transistor is also known as: impedance value power gain voltage gain current gain Correct answer: 4. Current gain

WRT a BJT If the base-emitter junction is open the collector voltage will be: Pulsating VCC 0 V 0.45 V Correct answer: 2. VCC

The diode which exhibits negative resistance characteristics: General purpose diode Tunnel diode Laser diode Schottky diode Correct answer: 2. Tunnel diode

In a pnp transistor, the p-regions are: Base and emitter Base and collector Emitter and collector Base, emitter and collector Correct answer: 3. Emitter and collector

Zener diodes having breakdown voltages of 7 V will operate in: Zener breakdown avalanche breakdown Both of these None of these Correct answer: 1. avalanche breakdown

The correct statement about Zener diodes operating area: Zener diode performs best at knee of the curve Operating a zener diode near the knee of the curve is good idea Impedance dramatically changes near knee of curve Impedance always remains constant at region near knee Correct answer: 3. Impedance dramatically changes near knee of curve

In saturation, a further increase in the base current of BJT will: Decrease collector current Increase collector current Not affect the collector current Switch transistor Correct answer: 3. Not affect the collector current

Depletion region in Zener diode is: Thick Normal Thin Very thin Correct answer: 4. Very thin

Varactor diode always operates in: Forward bias Reverse bias Correct answer: 2. Reverse bias

The internal resistance of a photodiode with light intensity: Decrease when forward-biased Decrease when reverse-biased Correct answer: 2. Decrease when reverse-biased