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Question

The instantaneous value of emf and current in an A.C. circuit are; E=1.414sin(100πtπ4) , I=0.707sin(100πt). The RMS value of emf will be
  1. 22V
  2. 1V
  3. 12V
  4. 122V

A
22V
B
1V
C
12V
D
122V
Solution
Verified by Toppr

Erms=Emax2

=1.4142=1V

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