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In a copper voltmeter, mass deposite in ...

In a copper voltmeter, mass deposite in `30` seconds is `'m'` gram. If the time-current graph is as shown in figure. `ECE` of copper is

A

`m`

B

`m//2`

C

`0.1m`

D

`0.6m`

Text Solution

Verified by Experts

The correct Answer is:
B
Area of i-t graph gives charge
`q = "it" = 1/2 (10+30)xx100 xx 10^(-3) = 2C`
`m = Z "it" = Z xx 2`
`Z = m//2`.
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