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If the reading of volmeter V(1) is 30 V,...

If the reading of volmeter `V_(1)` is 30 V, what is the reading of voltmeter `V_(2)` ?

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AC voltmeter reads rms value of voltage . RMS Voltage applied `=(V_(0))/(sqrt(2))=50V`
Reading of voltmeter `V_(2) ` is x, then `sqrt(x^(2)+40^(2))=50V`
`rArr x = 30 ` volt
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