[1] An ideal OP-AMP is an ideal

A. Current controlled Current source

B. Current controlled Voltage source

C. Voltage controlled Voltage source

D. Voltage controlled Current source

**Ans: C **

Answer

[2]

A 741-Type OP-AMP has a gain-bandwith product of 1MHz. A non-inverting

amplifier using this opamp & having a voltage gain of 20db will

exhibit -3db bandwidth of

A. 50KHz

B. 100KHz

C. 1000/17KHz

D. 1000/7.07KHz

**Ans: A **

Answer

[3]

An amplifier using an opamp with slew rate SR=1v/sec has a gain of

40db.If this amplifier has to faithfully amplify sinusoidal signals from

dc to 20KHz without introducing any slew-rate induced distortion, then

the input signal level exceed

A. 795mV

B. 395mV

C. 795mV

D. 39.5mV

**Ans: C **

Answer

[4] The ideal OP-AMP has the following characteristics

A. Ri=∞,A=∞,R0=0

B. Ri=0,A=∞,R0=0

C. Ri=∞,A=∞,R0=∞

D. Ri=0,A=∞,R0=∞

**Ans: A **

Answer

[5] The approximate input impedance of the opamp circuit which has Ri=10k, Rf=100k, RL=10k

A. ∞

B. 120k

C. 110k

D. 10k

**Ans: C **

Answer

[6] An opamp has a slew rate of 5V/ S. the largest sine wave o/p voltage possible at a frequency of 1MHz is

A. 10 V

B. 5 V

C. 5V

D. 5/2 V

**Ans: A **

Answer

[7] Assume that the op-amp of the fig. is ideal. If Vi is a triangular wave, then V0 will be

A. Square wave

B. Triangular wave

C. Parabolic wave

D. Sine wave

**Ans: D **

Answer

[8]

A differential amplifier is invariably used in the i/p stage of all

op-amps. This is done basically to provide the op-amps with a very high

B. Bandwidth

C. Slew rate

D. Open-loop gain

**Ans: C **

Answer

[9] A differential amplifier has a differential gain of 20,000. CMMR=80dB. The common mode gain is given by

**Ans: C **

Answer

[10]

In the differential voltage gain & the common mode voltage gain of a

differential amplifier are 48db & 2db respectively, then its common

mode rejection ratio is

**Ans: B **

Answer

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