Questions
A resistance of 20 W is connected to a source of an alternating potential V = 220 sin (100 t). The time taken by the current to change from the peak value to rms value, is
detailed solution
Correct option is C
i=VR=220Sin100πt20=11Sin100πt12×11=11Sin100πt⇒π4=100πt⇒t=2.5×10−3secTalk to our academic expert!
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