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Electronics and Communication Engineering - Analog Electronics

Exercise : Analog Electronics - Section 16
16.
An op-amp is fed from a signal source through resistance R1. If it is to work as sign changer, the feedback resistance Rf should be
equal to R1
twice R1
half R1
either (b) or (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
For a sinusoidal input, the circuit shown in the figure will act as a
Pulse generator
Full wave rectifier
Ramp generator
Voltage Doubler
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
A multivibrator can be used as a
cavity resonator
harmonic generator
wave form modifier
any of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
A multivibrator generates
sinusoidal waveforms
non-sinusoidal waveforms
both (a) and (b)
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
The derating factor, for ambient temperature higher than specified, for a transistor is about
2.5 mW/°C
0.5 mW/°C
10 mW/°C
20 mW/°C
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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