The rms value of ac whi h when passed throgh a resister produces heat three times of that produced by dc of 2A in the same resistor is
Answer (1)
31st May, 2019
according to your condition in question 3 times heat must be produced in resitor when ac current is passed
heat produced is calculated as i**2R hence
on equalting both the energy we finally get ......
the following equation :
irms^2 *R*t= 3*idc^2*R*t
irms=2*_/3
irms=3.46
hence on solving we get rms current to be 3.46 A
if you need to find max AC current it would be...
irms * 2
=3.46*2
=6.92
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