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Basic Concept of Electricity MCQs

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Practice free Basic Concept of Electricity multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 171 questions — no login required.

Question 154easy

Power factor of an ordinary electric bulb is

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Question 155easy

Power factor of an ac circuit is equal to

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Question 156easy

While drawing phasor diagram for a series circuit, the reference phasor is

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Question 157easy

Skin effect occurs when a conductor carries current at

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Question 158easy

The generation voltage is usually

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Question 159easy

The number of turns of a coil heving a time constant T are doubled. Then the new time constant will be

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Question 160easy

A 24 V battery of internal resistance r = 4 ohm connected to a variable resistance R. The rate of heat dissipated in the resistor is41maximum when the current drawn from the battery is I. The current drawn from the battery will be 1 2 when R is equal to

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Question 161easy

Two electrons moving parallel to each other of the same velocity will

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Question 162easy

Two wires A and B of the same material and length L and 2L have radius r and 2r, respectively. The ratio of their specific resistance will be

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