You short-circuit a 12 volt battery by connecting a short wire from one end of the battery to the other end. If the current in the short circuit is measured to be 17 amperes, what is the internal resistance of the battery

0.7Ω

Explanation:

Data

The electromotive force(emp)is 12 volts.

The short circuit current is 17 amperes.

The internal resistance is unknown.

In short circuit definitely the external resistance is Zero, we can find the internal resistance because of short circuit current.

when take R=0

divide both side by to find r

now substitute the values

Ω

The internal resistance of the battery is 0.7Ω

temp rises, and expansion