Soumya Ranjan Mohanty
Last Activity: 7 Years ago
Given: current=I=3A, time=t=5 minutes=5*60=300 seconds, work =W=1200 J
we know amount of charge flowing in the circuit=Q=It=3*300=900 C.
Electromotive force or emf is the work per unit charge in the circuit, or emf=W/Q=1200/900=4/3=1.33 V
So electromotive force applied on circuit is 1.33V.
Thanks,
Soumya Ranjan Mohanty.