Operational Amplifiers (OP-AMPS) MCQ

Test your knowledge of operational amplifiers with this online MCQ from MCQTRIP.com. Learn more about op amps and their applications with this quiz.

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The frequency at which the open-loop gain is equal to 1 is called

the unity-gain frequency

the notch frequency

the upper critical frequency

the cutoff frequency

None

The bandwidth of a dc amplifier having an upper critical frequency of 100 kHz is

infinity

100 kHz

unknown

0 kHz

None

An OTA is basically a

current-to-voltage amplifier

voltage-to-current amplifier

voltage-to-voltage amplifier

current-to-current amplifier

None

Which of the following characteristics does not necessarily apply to an op-amp?

high gain

low power

high input impedance

low output impedance

None

Of the valued listed, the most realistic value for open-loop gain of an op-amp is

100000

2000

80 dB

None

Noise on the input of a comparator can cause the output to

change back and forth erratically between two states

go to zero

hang up in one state

produce the amplified noise signal

None

Common-mode gain of an op-amp is

very low

always unity

unpredictable

very high

None

In a zero-level detector, the output changes state when the input

has a zero rate of change

crosses zero

is negative

is positive

None

The output of a particular op-amp increases 8 V in 12 μs. The slew rate is

1.5 V/μs

0.67 V/ μs

96 V/μs

None

For an op-amp with negative feedback, the output is

fed back to the noninverting input

fed back to the inverting input

equal to the input

increased

None

For an op-amp with negative feedback, the output is

equal to the input

fed back to the inverting input

increased

fed back to the noninverting input

None

A certain inverting amplifier has an Ri of 0.1 kΩ and an Rf of 100 kΩ. The closed loop gain is

101

1000

100

100,000

None

An Op-amp in the common mode has

the output signals are in-phase

the output are connected together

both inputs are grounded

an identical signal appears on both inputs

None

When an op-amp is operated in the single-ended mode, the output is grounded

one input is grounded and a signal is applied to the other

the output is not inverted

both inputs are connected together

None

To make a basic instrumentation amplifier, it takes

one op-amp with a certain feedback arrangement

three op-amps and seven capacitors

three op-amps an seven resistors

two op-amps and seven resistors

None

Phase shift through an op-amp is caused by

the gain roll-off

the internal RC circuits

negative feedback

the external RC circuits

None

In a scaling adder, the input resistors are

each proportional to the weight of its input

all of different value

related by a factor of two

all the same value

None

In an integrator, the feedback element is a

resistor

capacitor

zener diode

voltage divider

None

In an op-amp, the purpose of offset nulling is to

zero the output error voltage

equalize the input signals

reduce gain

None

The midrange open-loop of an op amp

rolls off at 20 db/decade beginning at 0 Hz

extends from 0 Hz to the upper critical frequency

extends from lower critical frequency to the upper critical frequency

None

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