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Operational Amplifier – 1 – 4

16. For an OP-amp with negative feedback, the output is …….

(a) equal to the input
(b) increased
(c) fed back to the inverting input
(d) fed back to the non-inverting input

Answer
Answer : (d)

Explanation
No answer description available for this question. Let us discuss.

17. The use of negative feedback …….

(a) reduces the voltage gain of an OP-amp
(b) makes the OP-amp oscillate
(c) makes linear operation possible
(d) a and b

Answer
Answer : (d)

Explanation
No answer description available for this question. Let us discuss.

18. Negative feedback ….

(a) increases the input and output impedances
(b) increases the input impedance and bandwidth
(c) decreases the output impedance and bandwidth
(d) does not affect impedance or bandwidth

Answer
Answer : (b)

Explanation
No answer description available for this question. Let us discuss.

19. A certain non-inverting amplifier has Ri Of 1 kΩ and Rf of 100 kΩ. The closed-loop voltage gain is ….

(a) 100,000
(b) 1000
(c) 101
(d) 100

Answer
Answer : (c)

Explanation
No answer description available for this question. Let us discuss.

20. If feedback resistor in Q.15 is open, the voltage gain ………..

(a) increases
(b) decreases
(c) is not affected
(d) depends on R

Answer
Answer : (a)

Explanation
No answer description available for this question. Let us discuss.

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