Transistors(Electrical Engineering ) Questions and answers for exam Preparation

Question 1. The collector of a transistor is ___________ doped

heavily
moderately
lightly
none of the above

Explanation:-

Answer: Option B. -> moderately

Question 2. The base resistor method is generally used in

Amplifier circuits
Switching circuits
Rectifier circuits
None of the above

Explanation:-

Answer: Option B. -> Switching circuits

Question 3. The number of depletion layers in a transistor is ___________

four
three
one
two

Explanation:-

Answer: Option D. -> two

Question 4. In voltage divider bias, operating point is 3 V, 2 mA. If VCC = 9 V, RC = 2.2 kΩ, what is the value of RE ?

2000 Ω
1400 Ω
800 Ω
1600 Ω

Explanation:-

Answer: Option C. -> 800 Ω

Question 5. The emitter of a transistor is ___________ doped

lightly
heavily
moderately
none of the above

Explanation:-

Answer: Option B. -> heavily

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

ICEO
ICBO
IC
(1 - a ) IB

Explanation:-

Answer: Option A. -> ICEO

Question 7. IC = aIE + ___________

IB
ICEO
ICBO
ßIB

Explanation:-

Answer: Option C. -> ICBO

Question 8. In a transistor amplifier circuit VCE = VCB + ___________

VBE
2 VBE
5 VBE
None of the above

Explanation:-

Answer: Option A. -> VBE

Question 9. In a transistor, signal is transferred from a ___________ circuit

high resistance to low resistance
low resistance to high resistance
high resistance to high resistance
low resistance to low resistance

Explanation:-

Answer: Option B. -> low resistance to high resistance

Question 10. The stability factor of a collector feedback bias circuit is ___________ that of base resistor bias.

The same as
More than
Less than
None of the above

Explanation:-

Answer: Option C. -> Less than