A bob of simple pendulum has mass 2g and a charge 5μc . It is at rest in a uniform horizontal electric field of intensity2000 V/m. At equilibrium, the angle that the pendulum makes with the vertical is

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Detailed Solution

At equilibrium Tsinθ=Eq → 1and Tcosθ=mg → 2by solving tanθ=Eqmg ⇒tanθ=2000×5×10−62×10−3×10 ⇒tanθ=0.5 ⇒θ=tan−10.5

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