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A current of 30 A is registered when the...

A current of `30 A` is registered when the terminals of a dry cell of `emf 1.5 volts` are connected through an ammeter. Neglecting the meter resistance, find the amount of heat produced in the battery in 10 seconds.

Text Solution

Verified by Experts

The current in the circuit will be
`I = epsilon/r`
or, `30A = (1.5V)/r` giving `r = 0.05 Omega`.
The amount of heat produced in the battery `i^2 rt = (30A)^2 xx (0.5 Omega) xx 10s = 450 J`.
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