In an electroplating experiment, m gm of silver is deposited when 4 ampere of current flows for 2 minute . The amount (in gm ) of silver deposited by 6 ampere of current for 40 second will be

Options

A. 4 m
B. `(m)/(2)`
C. `(4m)/(3)`
D. 3m

Answer

B

Explanation

`(W_(1))/(W_(2)) = (Q_(1))/(Q_(2))`
`(W_(1))/(W_(2)) = (I_(1) xx t_(1))/(I_(2) xx t_(2))`
`(m)/(W_(2)) = (4 xx 2 xx 60)/(6 xx 40)`
`W_(2) = (m)/(2)g`