Electrical Engineering MCQs

Page No. 339

A closed switch has a resistance of_____________?


azero


babout 50 ohms


cabout 500 ohms


dinfinity


View Answer zero

Two resistances Rl and Ri are connected in series across the voltage source where Rl>Ri. The largest drop will be across______________?


aRl


bRi


ceither Rl or Ri


dnone of them


View Answer Rl

The four bulbs of 40 W each are connected in series swift a battery across them, which of the following statement is true_______________?


a The current through each bulb in same


bThe voltage across each bulb is not same


cThe power dissipation in each bulb is not same


dNone of the above



Three 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open_________________?


a there will be heavy current in the main line


brest of the two bulbs will not light


call three bulbs will light


d the other two bulbs will light



If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes______________?


a0.4 ohm


b0.6 ohm


c0.8 ohm


d1.0 ohm


View Answer 0.4 ohm

If a parallel circuit is opened in the main line, the current_______________?


aincreases in the branch of the lowest resistance


bincreases in each branch


cis zero in all branches


dis zero in the highest resistive branch



The resistance of a few meters of wire conductor in closed electrical circuit is____________?


apractically zero


b low


chigh


dvery high


View Answer practically zero

Which of the following statement is true________________?


aA galvanometer with low resistance in parallel is a voltmeter


bA galvanometer with high resistance in parallel is a voltmeter


cA galvanometer with low resistance in series is an ammeter


dA galvanometer with high resistance in series is an ammeter



A 3 Q resistor having 2 A current will dissipate the power of_______________?


a2 watts


b4 watts


c6 watts


d12 watts


View Answer 12 watts

The filament of an electric bulb is made of______________?


acarbon


baluminium


c tungsten


dnickel


View Answer tungsten

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