EASY
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What is hot wire voltmeter?

Important Questions on Alternating Current

HARD
Consider the L - R circuit shown below and choose the correct statement(s)

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EASY
The frequency of AC mains in India is
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Why a dc voltmeter and a dc ammeter cannot read ac?
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For handling greater current induction wattmeter are used in conjunction with________.
MEDIUM

In pure inductive circuit, the curves between frequency f and reciprocal of inductive reactance 1XL is

MEDIUM

Represent the union of two sets by Venn diagram for each of the following.

X={x | x is a prime number between 80 and 100}

Y={y | y is an odd number between 90 and 100}

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_________ instruments indicate the instantaneous value of the electrical quantity being measured at the time at which it is being measured?
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The spring material used in a spring control device should have the following property:
MEDIUM
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Assertion: In the figure, just after closing the switch the potential drop across inductor is maximum.

Reason: The rate of change of current just after closing the switch is maximum.
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Hot wire ammeters are used for measuring-
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AC ammeters actually measure _____.
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Alternating currents can be produced by a