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Kirchhoff's Junction Law

A voltmeter c...

Question

A voltmeter connected in an $A C$ circuit reads 220 volt. $I E$ represents

A

peak voltage

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B

R.M.S voltage

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C

Average voltage

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D

Mean square voltage

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Solution

The correct option is A R.M.S voltage
The voltmeter and ammeter shows the mean square value as the alternating current is there and if the voltmeter and ammeter had shown actual values then it would have continuously changing between peak maximum and minimum peak very rapidly and hence the user cant get a idea of the readings.
Hence, root mean square value which has move significance in calculating Power, etc is shown.

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