Q.

One end of a 10 cm long silk thread is fixed to a large vertical surface of a charged nonconducting plate and the other end is fastened to a small ball having a mass of 10 g and a charge of 4.0 × 10-6 C . In equilibrium, the thread makes an angle of 600 with the vertical

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One end of a 10 cm long silk thread is fixed to a large vertical surface of a charged nonconducting plate and the other end is fastened to a small ball having a mass of 10 g and a charge of 4.0 × 10-6 C . In equilibrium, the thread makes an angle of 600 with the vertical