Abattery has a terminal voltage of 5 volts when a current of 500 milliamps flows through it. the internal resistance of the battery is 5 ohms. calculate e, the internal voltage (emf), of the battery.

2.5 volts

Explanation:

Terminal voltage of the battery is given as V =5 volts

Current through the battery

Internal resistance of the battery R = 5 ohm

For the any batter we know that

Where V is terminal voltage E is EMF of the battery and R is the internal resistance

So

the answer is b ) square root of 5