Electrical Engineering MCQs

Page No. 149

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


aQuicker operation


bHigher efficiency


cAbsence of flue gases


dAll of the above


View Answer All of the above

method has leading power factor____________?


aResistance heating


b Dielectric heating


cArc heating


dInduction heating


View Answer Dielectric heating

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


aInduction heating


bDielectric heating


cElectric resistance heating


dAll of the above



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


b5 volts


c5/ volts


d 5/2 volts


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


b100KHz


c1000/17KHz


d1000/7.07KHz


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


bBandwidth


cSlew rate


dOpen-loop gain


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


bTriangular wave


cParabolic wave


dSine wave


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


b1


c1/2


d0


View Answer 2

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


aNon inverter


bVoltage follower


cSummer


dDifference amplifier


View Answer Summer

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


aA ramp


bA sinusoidal wave


cA rectangular wave


dA triangular wave with dc bias


View Answer A ramp

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