Operational Amplifier and Its Applications MCQs

Question 1

When in a negative scaler, both RI and Rf are reduced to zero, the circuit functions as

Accepted Answer

transistor parameters determine oscillation frequency.

Answer

integrator

Answer

diffrentiator

Answer

comparator

Question 2

The two input terminals of an OP-AMP are known as

Accepted Answer

inverting and non-inverting

Answer

positive and negative

Answer

differential and non-differential

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high and low

Question 3

The purpose of comparator is to

Accepted Answer

produce a change in input voltage when an input voltage equals the reference voltage. ?

Answer

amplify an input voltage

Answer

detect the occurrence of a changing input voltage

Answer

maintain a constant output when the dc input voltage changes.

Question 4

The OP-AMP comparator circuit uses

Accepted Answer

no feedback

Answer

positive feedback

Answer

negative feedback

Answer

regeneratiye feedback

Question 5

The feedback path in an OP-AMP integrator constant of

Accepted Answer

a capacitor

Answer

a resistor

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a resistor and a capacitor in series

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a resistor and a capacitor in parallel.

Question 6

The feedback path in an OP-AMP differentiator consists of

Accepted Answer

a resistor

Answer

a capacitor

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a resistor and a capacitor in series

Answer

a resistor and a capacitor in parallel.

Question 7

The frequency of oscillation of an elementary LC oscillatory circuit depends on

Accepted Answer

both (b) and (c)

Answer

coil resistance

Answer

coil inductance

Answer

capacitance

Question 8

For sustaining oscillations in an oscillator

Accepted Answer

both (a) and (b)

Answer

feedback factor should be unity

Answer

phase shift should be 0?

Answer

feedback should benegative

Question 9

In a transistor Hartley oscillator

Accepted Answer

inductive feedback is used

Answer

untapped coil is used

Answer

entire coil is in the output circuit

Answer

no capacitor is used