1.

A simple pendulum having cahargeq_1 mass ma and effective length 1, is suspended from a rigid support between the plates of charged horizontal capacitor. Electric field in the capacitor is perpendicular to the plates and directed vertically downwards . If the plates are oriented such thet plates made an angeltheta with the horizontal then the new time period of the oscillation of the pendulum is give by .

Answer»

` T= 2 pi SQRT(l/sqrt (g^2 + ((QE)/m)^2 + 2g ((QQ)/m) SIN theta)`
` T= 2 pi sqrt(l/sqrt (g^2 + ((qE)/m)^2 + 2g ((qQ)/m) sin theta)`
` T= 2 pi sqrt(l/sqrt (g^2 + ((qE)/m)^2 + 2g ((qQ)/m) sin theta)`

Answer :B


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