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# Electrical Engineering QUESTIONS

Exam Name Electrical Engineering QUESTIONS Electrical 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 MASTER EXAM 9996 Anirudh(39157)

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Question: Electric current is measured by—

Answer:Ammeter

Question: A stove element draws 15 A when connected to 230 V line. How long does it take to consume one unit of energy ?

Answer:0.29 h

Question: the SI unit of conductivity is

Answer:mho/m

Question: a peice of oil soaked paper has been inserted between the parallel plate capacitor.then the potential difference between the plates will

Answer:decrease

Question: the current drawn by a tungusten filament lamp is measured by an ammeter the ammeter reading under steady state condition will be_________the ammeter reading when the supply is switched on.

Answer:less than

Question: Tesla is same as

Answer:Weber/(meter)²

Question: The unit of volume resistivity is

Answer:ohm-m3/m2

Question: Four resistances 2 Ω, 4 Ω, 5 Ω, 20 Ω are connected in parallel.Their combined resistance is

Answer:1 Ω

Question: A 200 W, 200 V bulb and a 100 W, 200 V bulb are connected in series and the voltage of 400 V is applied across the series connected bulbs. Under this condition

Answer:100 W bulb will be brighter than 200 W bulb

Question: The north pole of a magnet is moved away from a metallic ring. The induced current in the ring flows

Answer:anticlockwise

Question: Energy stored in an inductor is given by

Answer:1/2 LI²

Question: A coil with a certain number of turns has a specified time constant.If the number of turns is doubled, its time constant would

Answer:become double

Question: hysteresis is the phenomenon in the magnetic cicuit by which

Answer:B lags behind H

Question: the flux through each turn of a 100-turn coil is(t³-2t)mWh,where 't' is in seconds.find the magnitude of the induced emf at t=2s

Answer:1 V

Question: A circuit has inductance of 2 H. If the circuit current changes at the rate of 10 A/sec, then self-induced emf is

Answer:20 V

Question: The B-H curve for________will be a straight line passing through the origin.

Answer:air

Question: Magnetic lines of force coming from a magnet

Answer:cannot intersect at all

Question: the main advantage of temporary magnets is that we can

Answer:change the manetic flux

Question: The magnetic material used in permanent magnets is

Answer:hardened steel

Question: a current of 5 mA flows in a resistanceless choke from a 200 v alternating source. the energy consumed in the choke is

Answer:0 J