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Electronics and Communication Engineering - Analog Electronics

Exercise : Analog Electronics - Section 17
46.
Harmonic distortion in CB amplifier may be least when the load resistance is
negligible
very low
very high
infinite
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
If a common emitter amplifier with an emitter resistance RC has an overall transconductance gain of 1 m A/V, a voltage gain of - 4 and desensitivity of 50, then the value of the emitter resistance R would be
50 kΩ
0.98 kΩ
50 Ω
0.98 Ω
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
Turn on time of a transistor switch is equal to sum of (where tr is rise time, td is delay time)
ts - tr
ts - tf
td + tr
2tr
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
For the circuit shown in the figure, the capacitor C is initially uncharged. At t = 0, the switch S is closed. The voltage Vc across the capacitor at t = 1 millisecond is (In the figure shown above, the op-amp is supplied with ± 15 V and the ground has been shown by the symbol)
0 V
6.3 V
9.45 volts
10 volts
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
In amplifiers, the parasitic oscillation result due to
transistor inter junction capacitance
push pull operator
negative feedback
poor inter-stage coupling
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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