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When a voltage measuring device is conne...

When a voltage measuring device is connected to a.c. mains the meter shows the steady input voltage of `220 V`. This means

A

input voltage cannot be ac voltage, but a dc voltage.

B

maximum input voltage is 220 V

C

the meter reads voltage not V but `lt V^(2)gt` and is calibrated to read `sqrt(lt V^(2)gt)`.

D

the pointer of the meter is stuck by some mechanical defect.

Text Solution

Verified by Experts

The correct Answer is:
C
The voltmeter connected to ac mains is calibrated to read root mean square value or virtual value of ac voltage.
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