1.

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                                             [AIEEE 2005]

A.            \[\sin \theta \]
B.            \[\tan \theta \]
C.            \[\cos \theta \]
D.            \[\cot \theta \]
Answer» C.            \[\cos \theta \]


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