The equation of the alternating voltage applied to our houses is e=(311sin100πt) volt. A hot wire instrument is used to measure the alternating voltage. The rms value of emf is
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a
219.9V
b
329.1V
c
543.7V
d
432.7V
answer is A.
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Detailed Solution
Given ε0=311V εrms=ε02=3112×22 =3112×1.414 =155.5×1.414 =219.877 =219.9V