The instantaneous value of emf and current in an A.C. circuit are; E=1.414sin(100πt−π4) , I=0.707sin(100πt). The RMS value of emf will be
2√2V
1V
12V
12√2V
A
2√2V
B
1V
C
12V
D
12√2V
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Solution
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Erms=Emax√2
=1.414√2=1V
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