In an electroplating experiment, mg of silver is deposited when 4 A of current flows for 2 min. The amount of silver (in g) deposited by 6 A of current for 40 s will be

Options

A. 4 m
B. `m//2`
C. `-m//4`
D. `2 m`

Answer

B

Explanation

`m=zxx4xx2`
`m'=(zxx6xx40)/(60)`
`(m)/(m')=(8zxx60)/(240 z)=2 implies m'=(m)/(2)`