a dynamo dissipates 20 watt when it supplies a current of 4 A through it. if the terminal potential difference is 220V then the emf produced is ?
ans: 225V
how? plz explain.
Given that
Power, P = 20 W
Current, I = 4 A
Terminal Potential , Vt = 220 V
We know that
EMF produced by dynamo is given by
Power, P = 20 W
Current, I = 4 A
Terminal Potential , Vt = 220 V
We know that
EMF produced by dynamo is given by