Two capacitors `C_(1) and C_(2)` have the same separation between the plates but the plate area of `C_(2)` is twice that of `C_(1)`. The given graph shows the variation of q with V. Which of the two lines in the graph represents `C_(1)` and why?

Explanation

`C=(epsilon_(0)A)/(d)`, as area of plates of `C_(2)` is double than that of `C_(1)`
`therefore C_(2) gt C_(1), C prop q`
`therefore` The line A represents `C_(2)`, and line B represents `C_(1)`.