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

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b36 Q

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c 48 Q

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d64 Q

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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

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b 600 Q

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c 800 Q

✓


d1000 Q

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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

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b 66 v

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c 80 V

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d132 V

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View Answer 66 v

An instrument which detects electric current is known as_____________?


avoltmeter

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b rheostat

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c wattmeter

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d galvanometer

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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

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b1.4 x 10~8 Q-m

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c1.6 x 10″”8 Q-m

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d1.8 x 10″8 Q-m

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View Answer 1.6 x 10″”8 Q-m

With rise in temperature the resistance of semi-conductors_________________?


adecreases

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b increases

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cfirst increases and then decreases

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d remains constant

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View Answer decreases

With rise in temperature the resistance of pure metals______________?


aincreases

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bdecreases

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cfirst increases and then decreases

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dremains constant

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View Answer increases

The resistance of a conductor varies inversely as___________?


a length

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barea of cross-section

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c temperature

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d resistivity

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View Answer area of cross-section

Conductance is reciprocal of____________?


aresistance

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binductance

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creluctance

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dcapacitance

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View Answer resistance

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


a resistance

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b reluctance

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cconductance

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d inductance

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View Answer conductance

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