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When a voltage measuring device is connected to a.c. mains the meter shows the steady input voltage of `220 V`. This meansA. input voltage cannot be ac voltage, but a dc voltage.B. maximum input voltage is 220 VC. 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. |
Answer» Correct Answer - 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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