Electrical Engineering MCQs

Page No. 240

A linear resistor having 0 < R < °o is a______________?


acurrent controlled resistor


bvoltage controlled resistor


cboth current controlled and voltage controlled resistor


dnone of the above



Application of Norton’s theorem to a circuit yields:________________?


aequivalent current source and impedance in parallel


bequivalent current source and impedance in series


cequivalent impedance


dequivalent current source



An ideal voltage source has__________?


a zero internal resistance


bopen circuit voltage equal to the voltage on full load


cterminal voltage in proportion to current


dterminal voltage in proportion to load



If the energy is supplied from a source, whose resistance is 1 ohm, to a load of 100 ohms the source will be___________?


a a voltage source


ba current source


cboth of above


d none of the above


View Answer a voltage source

For similar carrier and modulating signals, the line current used in CSI is_____________?


a Identical to line voltage in a VSI


bIdentical to line current in VSI


cIdentical to phase voltage in VSI


dIdentical to phase voltage in CSI



During the commutation period in 3 phase converter, overlap time is____________?


aDependent on the load current


bDependent on the voltage


c Dependent on both the load current and load voltage behind the short circuit current


dIndependent on both the load current and load voltage



The effects of EMI can be reduced by_____________?


aSuppressing emissions


bReducing the efficiency of the coupling path


cReducing the susceptibility of the receptor


dAll of these


View Answer All of these

An SCR is made up of silicon because_____________?


asilicon has large leakage current than germanium


bsilicon has small leakage current than germanium


csilicon has small leakage voltage than germanium


dsilicon has large leakage voltage than germanium



AC power in a load can be controlled by using_____________?


atwo SCR’s in parallel opposition


b two SCR’s in series


cthree SCR’s in series


dfour SCR’s in series



The switching function of semiconductor devices can be characterized with____________?


aDuty ratio only


b Frequency only


cDuty ratio and frequency


d Duty ratio, frequency and time delay



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