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A charged ball B hangs from a silk threa...

A charged ball `B` hangs from a silk thread `S`, which makes an angle `theta` with a large charged conducting sheet `P`, as shown in the figure. The surface charge density `sigma` of the sheet is proportional to

A

`costheta`

B

`cotheta`

C

`sintheta`

D

`tantheta`

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