The instantaneous value of emf and current in an A.C. circuit are; E=1.414sin(100πt−π4) , I=0.707sin(100πt) . RMS value of current will be
√2A
12A
1A
1√2A
A
1A
B
√2A
C
1√2A
D
12A
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Solution
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Given : Imax=0.707A Rms value of current Irms=Imax√2 Irms=.707√2
=12A
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