MCQs

UJT has: One Two Three Four Correct answer: 3. Three

Using Gate terminal the SCS can be: Turned off only Turned on only Both of these None of these Correct answer: 3. Both of these

Number of terminals on SCR are: One Two Three Four Correct answer: 3. Three

Diac and Triac are which type of devices: Unidirectional, Unidirectional Unidirectional, Bidirectional Bidirectional, Unidirectional Bidirectional, Bidirectional Correct answer: 4. Bidirectional, Bidirectional

Total number of semiconductor layers in thyristors: 1 2 3 4 Correct answer: 4. 4

The emitter current is always greater than: Base current Collector current Both of these None of these Correct answer: 3. Both of these

The forward-biased base-emitter junction of a silicon BJT has an approximate voltage of: 0.4 V 0.45 V 0.7 V 0 V Correct answer: 3. 0.7 V

The less is the reverse bias in varactor diode: The less is the capacitance The more the capacitance Capacitance is independent of bias Correct answer: 2. The more the capacitance

A varactor diode exhibits which type of capacitance: A constant inductance over a range of reverse voltages A variable capacitance that depends on reverse voltage A variable capacitance that depends on forward current A constant capacitance over a range of reverse voltages A variable resistance that depends on reverse voltage Correct answer: 2. A variable … Read more

If a transistor amplifier outputs 10 V rms for an input of 100 mV rms, the voltage gain is: 0.1 10 100 10000 Correct answer: 3. 100