A direct current of 2a and an alternating current

Asked by admin @ 16/08/2021 in Physics viewed by 343 People

What is the approximate peak value of an alternating current producing 4 times the heat produced per second by a steady current of 2A in a resistor

1) 2.8A
2) 4A
3) 5.6A
4) 8A

Answered by admin @ 16/08/2021

Irms= 4×i steady (1)
Also,irms =Imax/√2. (2)
From 1 &2
Imax/√2=4×i steady
So Imax =5.6 A

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