Analog Electronics - Study Mode

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[#341] The inverting op-amp shown in the figure has an open-loop gain of 100. The closed-loop gain $$frac{{{{ ext{V}}_0}}}{{{{ ext{V}}_{ ext{s}}}}}$$ is

(A) -8

(B) -9

(C) -10

(D) -11

Correct Answer

(B) -9

[#342] For a full wave rectifier, with sinusoidal input and inductor as filter, ripple factor for maximum load current and minimum load current conditions are respectively

(A) 0.1 and 1

(B) 0.1 and 0.47

(C) 0 and 0.47

(D) 0 and 0.22

Correct Answer

(C) 0 and 0.47

[#343] If C 1 = 200 pF, C 2 = 50 pF in Colpitts oscillator and frequency is 1 MHz, then what is the value of inductance required?

(A) 1.25 mH

(B) 0.6332 mH

(C) 0.782 mH

(D) 0.432 mH

Correct Answer

(B) 0.6332 mH

[#344] The circuit shown in the figure is a

(A) positive clamper

(B) negative clamper

(C) positive clipper

(D) negative clipper

Correct Answer

(A) positive clamper

[#345] In the circuit shown in the figure, if R L = R C = 1 kΩ, then the value of V 0 will be

(A) 4.55 V

(B) 2.5 V

(C) 1 V

(D) zero

Correct Answer

(B) 2.5 V