Expression of AC current is given by I(t)=50sin‌(200πt)A ∴ Maximum value of alternating current, I0=50A ∴ RMS value of alternating current, Irms=‌
I0
√2
=‌
50
√2
=25√2A From the given expression of alternating current, we get ‌ω‌=200π ⇒2πf‌=200π ⇒‌‌f=100‌Hz Hence, I‌rms ‌=25√2 and f=100‌Hz