Electrical Engineering MCQs on Op Amp – Operational Amplifier MCQs
Contents
- 1 A step-input is given to an OP-amp integrator, the output will be
- 2 The common mode rejection ratio of a differential Op Amp whose differential voltage gain and common mode voltage gain are 48db and 2db respectively is
- 3 The input impedance of a differential amplifier equals r’e times
- 4 The common mode voltage gain is
- 5 Differential amplifiers are used in
A step-input is given to an OP-amp integrator, the output will be
A step-input is given to an OP-amp integrator, the output will be
- A ramp
- A rectangular wave
- A sinusoidal wave
- A triangular wave with dc bias
Correct answer: 1. A ramp
The common mode rejection ratio of a differential Op Amp whose differential voltage gain and common mode voltage gain are 48db and 2db respectively is
The common mode rejection ratio of a differential Op Amp whose differential voltage gain and common mode voltage gain are 48db and 2db respectively is:
- 20 dB
- 25 dB
- 46 dB
- 58 dB
Correct answer: 3. 46 dB
The input impedance of a differential amplifier equals r’e times
The input impedance of a differential amplifier equals r’e times
- ß
- 2ß
- RE
- RC
Correct answer: 2. 2ß
The common mode voltage gain is
The common mode voltage gain is
- Smaller than differential voltage gain
- Equal to differential voltage gain
- Greater than differential voltage gain
- None of these
Correct answer: 1. Smaller than differential voltage gain
Differential amplifiers are used in
Differential amplifiers are used in
- Buffers
- Instrumentation amplifiers
- Voltage followers
- Voltage regulators
Correct answer: 2. Instrumentation amplifiers