1. 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

50KHz

100KHz

1000/17KHz

1000/7.07KHz

Correct answer: (A) 50KHz

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

2

1

43862

0

Correct answer: (A) 2

3. 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

CMMR

Bandwidth

Slew rate

Open-loop gain

Correct answer: (C) Slew rate

4. A non inverting closed loop op amp circuit generally has a gain factor

Less than one

Greater than one

Of zero

Equal to one

Correct answer: (B) Greater than one

5. 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

795mV

395mV

795mV

39.5mV

Correct answer: (C) 795mV

6. An ideal OP-AMP is an ideal

Current controlled Current source

Current controlled voltage source

Voltage controlled voltage source

voltage controlled current source

Correct answer: (C) Voltage controlled voltage source

7. An OPAMP has a slew rate of 5 V/μ S .The largest sine wave O/P voltage possible at a frequency of 1 MHZ is

10 volts

5 volts

5/ volts

5/2 volts

Correct answer: (D) 5/2 volts

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

10 V

5 V

5V

5/2 V

Correct answer: (A) 10 V

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

Square wave

Triangular wave

Parabolic wave

Sine wave

Correct answer: (D) Sine wave

10. Calculate the cutoff frequency of a first-order low-pass filter for R1 = 2.5kΩ and C1 = 0.05μF