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OP-AMP Circuits

Study 24 Electrical Engineering MCQs with correct answers and explanations.

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21Electrical EngineeringMedium

When a step-input is given to an op-amp integrator, the output will be________?

AA sinusoidal wave

BA triangular wave with dc bias

CA rectangular wave

DA ramp

Correct answer

D. A ramp

Explanation

The correct answer is A ramp.

22Electrical EngineeringMedium

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

A12.73kHz

B1.273kHz

C127.3 kHz

D127.3 Hz

Correct answer

B. 1.273kHz

Explanation

The correct answer is 1.273kHz.

23Electrical EngineeringMedium

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

A5V

B10 V

C5/2 V

D5 V

Correct answer

B. 10 V

Explanation

The correct answer is 10 V.

24Electrical EngineeringMedium

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________?

A395mV

B39.5mV

C795mV

Correct answer

C. 795mV

Explanation

The correct answer is 795mV.

21Electrical EngineeringMedium

When a step-input is given to an op-amp integrator, the output will be________?

AA sinusoidal wave

BA triangular wave with dc bias

CA rectangular wave

DA ramp

Correct answer

D. A ramp

Explanation

The correct answer is A ramp.

22Electrical EngineeringMedium

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

A12.73kHz

B1.273kHz

C127.3 kHz

D127.3 Hz

Correct answer

B. 1.273kHz

Explanation

The correct answer is 1.273kHz.

23Electrical EngineeringMedium

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

A5V

B10 V

C5/2 V

D5 V

Correct answer

B. 10 V

Explanation

The correct answer is 10 V.

24Electrical EngineeringMedium

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________?

A395mV

B39.5mV

C795mV

Correct answer

C. 795mV

Explanation

The correct answer is 795mV.