Question

an alternating emf is given by e=220sinwt(in volt).What will be it's value at time t=T/12​

Answer 1

Given e=220sin(120πt)            

.(i) R=110Ω

e=e0sinωt                      

(ii)Comparing (i) and (ii) e0=220volt, ω=120π

i0=Re0=110220=2

i0=2Amp.

irms=2I0=22=1.414Amp.

ω=2nπ=120π

n=60Hz.

T=n1=601=0.0166sec.