21 Q. A 100 ohm resistance is connected across an alternating potential V = 200 sin (100 π t). Calculate time taken by the current to change from its peak value to rms value. What will be the rms value of current? Share with your friends Share 0 Vijay Shankar Yadav answered this Dear Student, We have V=V0Sin(ωt) Current at any instant of timeis given by:I = Iosinωtwhere Io is the maximum current.when I = Irmswe can writeIrms = IosinωtIrms = Io2Io2 = Iosinωt12 = sinωtωt = π42πνt = π4where ν is the frequency = 50 Hzt is the time in which current reaches to rms.t = 14×2×50t = 0.0025 st = 2.5 milli second Regards 1 View Full Answer