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The bob of a simple pendulum has mass 2g and a charge of 5.0 μC. It is at rest in a uniform horizontal electric field of intensity 2000 V/m. At equilibrium, the angle that the pendulum makes with the vertical is – (take g = 10 m/s2)

(1)  tan–1 (5.0)

(2)  tan–1 (0.5)

(3)  tan–1 (0.2)

(4) tan–1 (2.0)

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Correct option  (2) tan–1 (0.5)

Explanation:

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