1. Cross over distortion will occur in
A) Push Pull Amplifiers
B) Complementary symmetry amplifiers
C) Emitter follower
D) Single-stage amplifiers
Answer:- A) Push Pull Amplifiers
2. In MOD-10 counter, how many flip-flop are cascaded?
A) 2 B) 4 C) 3 D) Any number
Answer:- B) 4
3. The reverse saturation current of a Ge. P.N. junction doubles for every °C rise in ambient temperature
A) 1°C B) 2°C
C) 10°C D) None of the above
Answer:- C) 10°C
4. Memory that loses its contents when power is lost
A) Nonvolatile B) Volatile
C) Random D) Static
Answer:- B) Volatile
5. In 8085, the instructions RAL is
A) One byte instruction
B) two byte instruction
C) Three byte instructions
D) Four byte instructions
Answer:- A) One byte instruction
6. Modern FM receivers use de-emphasis circuit for
A) Reducing high frequency noise
B) Reducing the amplitude of high frequencies in the audio signal
C) Increasing the amplitude of higher modulating frequencies
D) Making demodulation easy
Answer:- B) Reducing the amplitude of high frequencies in the audio signal
7. For sound portion of TV transmission, deviation ratio is
A) 5 B) 1.67 C) 88 D) 200
Answer:- B) 1.67
8. Negative feedback reduces distortion in the amplifier only when it
A) comes as part of input signal
B) is generated in it
C) is part of its output
D) exceeds a certain safe level
Answer:- B) is generated in it
9. The unit of dielectric strength is
A) KV/m B) current/min
C) ampere/second C) volts/div
Answer:- A) KV/m
10. For insulators, the forbidden energy gap is of the order of
A) 5 eV B) 1 eV
C) 0.1 eV D) Zero
Answer:- A) 5 eV
11. In an unbiased juntion the thickness of charge depletion region is of the order of
A) 0.005 μ m B) 0.5 μ m
C) 5 μ m D) 10-¹⁰ m
Answer:- B) 0.5 μ m
12. Schottky barrier diode can be used as
A) Low noise amplifier
B) Variable capacitance device
C) Power supply rectifier
D) Low level detector
Answer:- D) Low level detector
13. JFET has main drawback of
A) having low input impedance
B) having high output impedance
C) being noisy
D) having small gain-bandwidth product
Answer:- D) having small gain-bandwidth product
14. In voltage amplifiers the load resistance should be
A) as large as possible
B) as small as possible
C) Equal to output impedance
D) Equal to input impedance
Answer:- A) as large as possible
15. Darlington amplifier circuits is obtained by cascading
A) two Emitter follower amplifiers
B) two CB stages
C) two CE stages
D) a CE stage followed by a CB stage
Answer:- A) two Emitter follower amplifiers
UPLOADING............
14. In voltage amplifiers the load resistance should be
A) as large as possible
B) as small as possible
C) Equal to output impedance
D) Equal to input impedance
Answer:- A) as large as possible
15. Darlington amplifier circuits is obtained by cascading
A) two Emitter follower amplifiers
B) two CB stages
C) two CE stages
D) a CE stage followed by a CB stage
Answer:- A) two Emitter follower amplifiers
UPLOADING............
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