An AC voltage of V-220-2sin 100- t- 2 is applied across a DC voltmeter- its reading will be-

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Standard XII

Physics

Electrical Oscillations

An AC volta...

Question

An $A C$ voltage of $V = 220 \sqrt{2} sin (100 π t + \frac{π}{2})$ is applied across a $D C$ voltmeter, its reading will be:

220 \sqrt{2} v

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\sqrt{2} v

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220 v

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z e r o

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Solution

The correct option is D $z e r o$
A DC Voltmeter measures only average value. Incase of AC average voltage will be zero. Hence DC voltmeter reads zero Volt

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An AC voltage of V=220√2sin(100πt+π2) is applied across a DC voltmeter, its reading will be:

The correct option is D zeroA DC Voltmeter measures only average value. Incase of AC average voltage will be zero. Hence DC voltmeter reads zero Volt

An $A C$ voltage of $V = 220 \sqrt{2} sin (100 π t + \frac{π}{2})$ is applied across a $D C$ voltmeter, its reading will be:

The correct option is D $z e r o$
A DC Voltmeter measures only average value. Incase of AC average voltage will be zero. Hence DC voltmeter reads zero Volt