40.

41.

42.

43.

44.

45.

46.

47.

48.

49.

The switching of power with a PNP transistor is called
(A) forward sourcing (B) | sinking current
(C) sourcing current 0) reverse sinking

In the initial stages of a multistage amplifier, we use
(A) RC coupling (B) Transformer coupling
(C) Direct coupling (D) None of the above

The total gain of a multistage amplifier is less than the product of the gains of individual

stages due to
(A) power loss in the coupling device (B) loading effect of the next stage
(C) _ the use of many transistors (D) ‏علا‎ use of many capacitors

The oscillator that is mostly used for generating audio frequency signals is

(4) Wein bridge (B) Tuned base

(C) Tuned collector (D) RC phase shift
multivibrator is a square wave oscillator.

(^) Monostable (8) Astable

(C) 8151801६ (D) None of the above

In a bistable multivibrator circuit, commutating capacitor is used to
(A) _ increase the base storage charge (B) provide ac coupling
(C) increase the speed of response (D) provide the speed of oscillations

A certain non-inverting amplifier has ‏بآ‎ of 2 kQ and ‏بط‎ of 100 kQ. The closed loop
voltage gain is

(^) 100 (B) 50
(0 51 (D) 49
In differential mode of op-amp, if output voltage is equal to the difference between
outputs of individual transistors, its amplitude will be the amplitude of signal
voltage yielded at collector to ground.
(ಯ) twice (B) thrice
(C) णपा times (D) one-fourth times

Common mode voltage gain of an op-amp is generally
(A) <1 (B) =
(ಲ) <] (D) None of the mentioned

A 741 op-amp has a gain bandwidth product of 2 MHz. If a non-inverting amplifier using
this op-amp has a voltage gain of 40 dB, then its -3dB bandwidth is ⋅
(^) 100 kHz ൫ 20kHz
(C) 10 kHz (D) 50 kHz

004/2021 - 9 + + ടട ↽∆