Transistors(Computer Science ) Questions and answers for exam Preparation

Question 1. A tuned amplifier is generally operated in ___________ operation

Class A
Class C
Class B
None of the above

Explanation:-

Answer: Option B. -> Class C

Question 2. The arrow in the symbol of a transistor indicates the direction of ___________

electron current in the emitter
electron current in the collector
hole current in the emitter
donor ion current

Explanation:-

Answer: Option C. -> hole current in the emitter

Question 3. A transistor is a ___________ operated device

current
voltage
both voltage and current
none of the above

Explanation:-

Answer: Option A. -> current

Question 4. At series resonance, voltage across L is ___________ voltage across C

Equal to but opposite in phase to
Equal to but in phase with
Greater than but in phase with
Less than but in phase with

Explanation:-

Answer: Option A. -> Equal to but opposite in phase to

Question 5. In parallel resonance, the circuit impedance is ___________

C/LR
R/LC
CR/L
L/CR

Explanation:-

Answer: Option D. -> L/CR

Question 6. IC = [a / (1 - a )] IB + [ / (1 - a )]

ICBO
ICEO
IC
IE

Explanation:-

Answer: Option A. -> ICBO

Question 7. The dimensions of L/CR are that of ___________

Farad
Henry
Ohm
None of the above

Explanation:-

Answer: Option C. -> Ohm

Question 8. The disadvantage of base resistor method of transistor biasing is that it ___________

Is complicated
Is sensitive to changes in ß
Provides high stability
None of the above

Explanation:-

Answer: Option B. -> Is sensitive to changes in ß

Question 9. If the value of a is 0

9
0.9
900
90

Explanation:-

Answer: Option D. -> 90

Question 10. The purpose of resistance in the emitter circuit of a transistor amplifier is to ___________

Limit the change in emitter current
Provide base-emitter bias
Limit the maximum emitter current
None of the above

Explanation:-

Answer: Option A. -> Limit the change in emitter current