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Electronics and Communication Engineering - Analog Electronics

Exercise : Analog Electronics - Section 10
26.
Two 3Ω speakers in series will have a total impedance of
1 Ω
3 Ω
6 Ω
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
The input resistance Ri of the amplifier shown in the figure
100 kΩ
40 kΩ
∞
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
In a CE amplifier the ac signal is increased. Which of the following will not change?
Ac base voltage
Ac collector voltage
Ac emitter voltage
Ac collector voltage and ac emitter voltage
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
The ideal op-amp has the following characteristics
Ri = ∞, A = ∞, R0 = 0
Ri = 0, A = ∞, R0 = 0
Ri = ∞, A = 0, R0 = 0
Ri = 0, A = ∞, R0 = ∞
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
The input differential stage of op-amp. 741 is baised at about 10 μA current such a low current of the input stage gives
  1. high CMRR
  2. high differential gain
  3. low differential
  4. high input impedance
Which of these are correct?
1 and 2
1, 2 and 4
3 and 4
1, 2, 3 and 4
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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