Electrical Engineering QUESTIONS

Exam NameElectrical Engineering QUESTIONS
DescriptionElectrical Engineering QUESTIONS and Answers exams contains the questions from various competitive exams.These questions are the part of previous year paper.These kind of questions would be helpful in preparing for exams like IAS, PCS, UPSC, NDA, CDS SSC, RRB, PSC, IBPS

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Question: the Q factor of a parallel resonant circuit is given by


Question: in an R-L series circuit, the phase difference between applied voltage and circuit current will increase if

Answer:XL is increased

Question: A series circuit has R =..4 0, XL = 12 E2 and Xc = 9 Q and is supplied with 200 V, 50 Hz.Calculate the power.

Answer:6400 W

Question: The reactance of 1 farad capacitance when connected to a DC circuit is


Question: a supply voltage of 230 V, 50 Hz is fed to a residental building. write down its equation for instantaneous value.

Answer:325 sin 314.16 t

Question: The AC bridge used for measurement of dielectric loss of capacitor is

Answer:schering bridge

Question: In electrodynamometer ammeter,the deflection of the pointer is proportional to

Answer:mean-square of currents in fixed coil and moving coil

Question: In which of the following transformers, is the secondary winding always kept closed ?

Answer:Current transformer

Question: two holes are drilled in the disc on a diameter of energy-meter to

Answer:eliminate creeping on no-load

Question: Which of the following instruments has the highest torque/weight ratio among the given instruments ?

Answer:Permanent magnet moying coil instrument

Question: If current through the operating coil of a moving iron instrument is doubled,the operating force becomes

Answer:4 times

Question: In moving iron instruments, the iron moves in a direction to cause

Answer:minimum reluctance path

Question: a moving coil instrument has a resistance of 10O and gives full scale defection at 0.5 V potential difference across it. how it be adapted to measure a current upto 100 A

Answer:By connecting shunt resistance of 0.005O across the meter

Question: The multiplying power of the shunt of a milliammeter is 8. If the circuit current is 200 mA, then current through the meter is

Answer:25 mA

Question: The material to be used in the manufacture of a standard resistor should be of

Answer:high resistivity and low temperature coefficient

Question: In a 3-phase induction motor crawling happens at

Answer:odd multiples of fundamental

Question: a 4-pole, 3-phase induction motor runs at 1440 rpm on a 50 Hz supply. find the slip speed.

Answer:60 rpm

Question: low voltage winding are placed nearer to the core in the case of concentric winding because

Answer:it reduces insulation requirement

Question: If K is the phase-to-phase voltage ratio, then the line-to-line voltage ratio in a 3-phase Y—? transformer is


Question: In an autotransformer of voltage ratio V1/V2
V1>V2, the fraction of power transferred inductively is proportional to

Answer:(V1-V2) /V1