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An infintie by long plate has surface ch...

An infintie by long plate has surface change density `sigma` As shown in the fig .apoint charge `q` is moved form `A` to `B` .Net work done by electric field is

A

`(sigmaq)/(2epsilon_(0))(X_(1)-X_(2))`

B

`(sigmaq)/(2epsilon_(0))(X_(2)-X_(1))`

C

`(sigmaq)/(epsilon_(0))(X_(2)-X_(1))`

D

`(sigmaq)/(epsilon_(0))(2pir+r)`

Text Solution

Verified by Experts

The correct Answer is:
A
`W_("net")=qvec(E).vec(d)`
where `vec(E)=(sigma)/(2epsilon_(0))hat(i):.W_("net")=q(sigma)/(2epsilon_(0)).(x_(1)-x_(2))`
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