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The bob of a simple pendulum has mass 2 g and a charge of 5.0 C. 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=10m/s2)

(a)

tan−1 (0.2)

(b)

tan−1(5.0)

(c)

tan−1(2.0)

(d)

tan−1(0.5)


Question ID - 51156 | Toppr Answer

The bob of a simple pendulum has mass 2 g and a charge of 5.0 C. 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=10m/s2)

(a)

tan−1 (0.2)

(b)

tan−1(5.0)

(c)

tan−1(2.0)

(d)

tan−1(0.5)

1 Answer - 5876 Votes

3537

Answer Key : (d) -

Tcos  = mg

Tsin   =qE

tan  =

tan  = =                       

     ⇒  tan−1                                    



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