Competitive Exams: Electronics MCQs (PracticeTest 8 of 13)
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A non inverting closed loop op amp circuit generally has a gain factor

Less than one

Greater than one

Of zero

Equal to one
Answer: b


If ground is applied to the ( + ) terminal of an inverting opamp, the ( — ) terminal will

Not need an input resistor

Be virtual ground

Have high reverse current

Not invert the signal
Answer: b


The closedloop voltage gain of an inverting amplifier equal to

The ratio of the input resistance to feedback resistance

The openloop voltage gain

The feedback resistance divided by the input resistance

The input resistance
Answer: c


An ideal OPAMP is an ideal

Current controlled Current source

Current controlled voltage source

Voltage controlled voltage source

voltage controlled current source
Answer: b


Calculate the cutoff frequency of a firstorder lowpass filter for R1 = 2.5 k and C1 = 0.05 F

1.273kHz

12.73kHz

127.3 kHz

127.3 Hz
Answer: a


How many opamps are required to implement this equation Vo = V1

4

3

2

1
Answer: d


An OPAMP has a slew rate of 5 V/µS. The largest sine wave O/P voltage possible at a frequency of 1 MHZ is

10 volts

5 volts

5/3 volts

5/2 volts
Answer: d
