The potential difference across the terminals of a battery of `emf 12 V` and internal resistance `2 Omega` drops to `10 V` when it is connected to a silver voltameter. Find the silver deposited at the cathode in half an hour. Atomic weight of silver is `107.9 g mol^(-1)`.

Answer

B

Explanation

For potential drop, t = 30min `
`V_i = V_f +iR`
` 12 = 10+2i `
`rArr I = lamp.`
` m = zit `
`(107.9)/(96500) xx 30xx60xx = 2.01 g`