Op Amp MCQs Part 1

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Electrical Engineering MCQs on Op Amp – Operational Amplifier MCQs

The differential gain of Op-amp is

The differential gain of Op-amp is

  1. Around 100
  2. Dependent on input voltage
  3. Very high
  4. Very low

Correct answer: 3. Very high

If ground is applied to the (+) terminal of an inverting OP-amp, the (–) terminal will

If ground is applied to the (+) terminal of an inverting OP-amp, the (–) terminal will

  1. Be virtual ground
  2. Have high reverse current
  3. Not invert the signal
  4. Not need an input resistor

Correct answer: 1. Be virtual ground

Op-amp circuits are cascaded without changing their input output relationships

Op-amp circuits are cascaded without changing their input output relationships

  1. True
  2. False

Correct answer: 1. True

When a differential amplifier is operated single-ended

When a differential amplifier is operated single-ended

  1. Its output is grounded
  2. Both inputs are connected together
  3. The output is not inverted
  4. One input is grounded and signal is applied to the other

Correct answer: 4. One input is grounded and signal is applied to the other

The common mode voltage gain of a differential amplifier is equal to RC divided by

The common mode voltage gain of a differential amplifier is equal to RC divided by

  1. 2RE
  2. re
  3. 2re
  4. re/2

Correct answer: 1. 2RE

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