Electrical Engineering MCQs

Page No. 342

The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms, what is the resistance of the other ?


a18 Q


b36 Q


c 48 Q


d64 Q


View Answer 36 Q

A light bulb draws 300 mA when the voltage across it is 240 V. The resistance of the light bulb is___________?


a400 Q


b 600 Q


c 800 Q


d1000 Q


View Answer 800 Q

In a circuit a 33 Q resistor carries a current of 2 A. The voltage across the resistor is


a33 V


b 66 v


c 80 V


d132 V


View Answer 66 v

An instrument which detects electric current is known as_____________?


avoltmeter


b rheostat


c wattmeter


d galvanometer


View Answer galvanometer

The resistance of a copper wire 200 m long is 21 Q. If its thickness (diameter) is 0.44 mm, its specific resistance is around_______________?


a1.2 x 10~8 Q-m


b1.4 x 10~8 Q-m


c1.6 x 10″”8 Q-m


d1.8 x 10″8 Q-m


View Answer 1.6 x 10″”8 Q-m

With rise in temperature the resistance of semi-conductors_________________?


adecreases


b increases


cfirst increases and then decreases


d remains constant


View Answer decreases

With rise in temperature the resistance of pure metals______________?


aincreases


bdecreases


cfirst increases and then decreases


dremains constant


View Answer increases

The resistance of a conductor varies inversely as___________?


a length


barea of cross-section


c temperature


d resistivity


View Answer area of cross-section

Conductance is reciprocal of____________?


aresistance


binductance


creluctance


dcapacitance


View Answer resistance

The property of a conductor due to which it passes current is called___________?


a resistance


b reluctance


cconductance


d inductance


View Answer conductance

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