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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 figure. The surface charge density `sigma` of the sheet is proportional to

A

cot `varphi`

B

tan `varphi`

C

sec `varphi`

D

cosec `varphi`

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The correct Answer is:
B
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