Exercise: Exam Question Papers

Questions for: Exam Question Papers

The op-amp used in nonlinear mode is
A:
integrators
B:
active filters
C:
Schmitt triggers
D:
instrumentation amplifiers
Answer: B
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Which of the following does not show non-linear V-I characteristics?
A:
Schottky diode
B:
Tunnel diode
C:
Thermister, at a fixed temperature
D:
p-n junction diode
Answer: C
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The load end of a quarter wave transformer gets disconnected thereby causing an open-circuited load. What will be the input impedance of the transformer?
A:
Zero
B:
Infinite
C:
Finite and Positive
D:
Finite and Negative
Answer: A
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The Hilbert transform of cos ω1t + sin ω2t is
A:
sin ω1t + cos ω2t
B:
sin ω1t - cos ω2t
C:
cos ω1t - cos ω2t
D:
sin ω1t + sin ω2t
Answer: B
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Which of the following photodetector does not provide gain?
A:
Phototransistor
B:
Photoconductor
C:
Avalanche photodiode
D:
p-i-n photodiode
Answer: D
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