A storage battery with emf `2.6 V` loaded with external resistance produces a current `1 A`. In this case, the potential difference between the terminals of the storage battery equals `2 V`. Find the thermal power generated in the battery and the net power supplied by the battery for external circuit.

Answer

B

Explanation

`V=E-ir`
`:. r=(E-V)/i=(2.6-2)/1`
`=0.6Omega`
Now, power generated in the bttery
`P=i^2r`
`=(1)^2(0.6)=0.6W`
Power supplied by the battery `=Ei`
`=2.6W`
`:.` Net supplied for external circuit
`=2.6-0.6=2.0W`