HomeTop electrical MCQTop electrical MCQ Top electrical MCQ Education March 28, 2023 0 1➤ Which of the following can produce maximum induced voltage? 1 A, 60 Hz AC current 1 A DC current 50 A DC current1 A, 490 Hz AC current2➤ At resonant frequency, an R-L-C circuit draws maximum current due to the reason that The voltage across the capacitor equals the applied voltageThe impedance is more than resistanceThe difference between capacitive reactance and inductive reactance is zeroThe power factor is less than unity3➤ In dc machines, the air gap flux distribution in space at no load is Flat toppedTriangularPulsatingRectangular4➤ The errors mainly caused by human mistakes are A. . B. C. . D. gross errorobservational errorsystematic error.instrumental error.5➤ The smallest change in measured variable to which instrument will respond is .accuracyprecisionresolutionsensitivity6➤ Comparison methods are used because they are expensive.when a high accuracy of measurement is requiredbecause they are most simple.because they take least time in measurement7➤ Pendant holders are used in domestic installation, when the lamp is to be: suspended verticallyfixed on wall fixed on boardfixed at an angle8➤ If a DC series motor is started on no load, its speed will be: Very smallNormalZeroEnormously high 9➤ The direction of magnetic lines of force around a straight current carrying conductor may be determined by: Faraday's lawLenz's lawCork screw rule Fleming's left hand rule 10➤ The direction of magnetic lines of force is: have no directionfrom N to S pole not fixed from S to N pole11➤ Which material is used for making emitters in vacuum tubes? carbonSulphurtungstenSilicon12➤ Rectification efficiency and ripple factor of a full wave rectifier __________ and ______ respectively. 100 %, 0.482 91.6 %, 1.21 81.2 %, 0.48240.6 %, 1.2113➤ The phenomenon of lagging of flux density behind the magnetizing force is called as magnetic leakagemagnetic hysteresisrelative permeabilityMmf14➤ A non-sinusoidal periodic waveform is free from DC component, cosine components and even harmonics. The waveform has half wave and odd function symmetry.onty odd function symmetryonly half wave symmetry.half wave and even function symmetry15➤ Which of the following methods is NOT used in the improvement of p.f. of a power network?. Use of high p.f. equipmentHigh inductive elements in series with the loadsUse of synchronous capacitorsUse of static capacitors in parallel16➤ Specific resistance of a conductor depends upon resistance of the conductorboth A. and B.composition of conductor materialdimension of the conductor17➤ The moving coil-meters, damping is provided by eddy current diskdamping vane in the airtight chamberthe coil spring attached to the movingthe aluminium frame of the coil18➤ Which of the following materials possess the least specific resistance? . AluminiumSilverCopperIron19➤ The scale of hot wire ammeter is CrampedLinearNon LinearAbsolute linear.20➤ The fractional slip of an induction motor is the ratio of rotor cu-loss/stator cu lossrotor cu-loss/rotor outputstator cu-loss/stator inputrotor cu-loss/rotor input SubmitYour score is Tags Top electrical MCQ Newer Older