Electrical Engineering MCQs

Page No. 149

Which of the following is an advantage of heating by electricity ?


aQuicker operation

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bHigher efficiency

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cAbsence of flue gases

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dAll of the above

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View Answer All of the above

method has leading power factor____________?


aResistance heating

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b Dielectric heating

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cArc heating

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dInduction heating

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View Answer Dielectric heating

Which of the following methods of heating is not dependent on the frequency of supply ?


aInduction heating

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bDielectric heating

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cElectric resistance heating

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dAll of the above

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An OPAMP has a slew rate of 5 V/μ S .The largest sine wave O/P voltage possible at a frequency of 1 MHZ is_______________?


a10 volts

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b5 volts

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c5/ volts

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d 5/2 volts

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View Answer 5/2 volts

A 741-Type OP-AMP has a gain-bandwith product of 1MHz. A non-inverting amplifier using this opamp & having a voltage gain of 20db will exhibit -3db bandwidth of______________?


a50KHz

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b100KHz

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c1000/17KHz

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d1000/7.07KHz

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View Answer 50KHz

A differential amplifier is invariably used in the i/p stage of all op-amps. This is done basically to provide the op-amps with a very high______________?


aCMMR

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bBandwidth

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cSlew rate

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dOpen-loop gain

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View Answer Slew rate

Assume that the op-amp of the fig. is ideal. If Vi is a triangular wave, then V0 will be______________?


asquare wave

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bTriangular wave

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cParabolic wave

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dSine wave

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View Answer Sine wave

A differential amplifier has a differential gain of 20,000. CMMR=80dB. The common mode gain is given by_______________?


a 2

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b1

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c1/2

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d0

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View Answer 2

Which of the following amplifier is used in a digital to analog converter?


aNon inverter

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bVoltage follower

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cSummer

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dDifference amplifier

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View Answer Summer

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


aA ramp

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bA sinusoidal wave

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cA rectangular wave

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dA triangular wave with dc bias

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View Answer A ramp

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