Question

A pendulem bob of mass 80 mg and carrying a charge of 2108 coul. Is at rest in a horizontal uniform electric field of 20,000 vm1. Find the tension in the thread of pendulum.

Answer 1

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As the electric field is in horizontal direction and the bob is positively charged it ... qE/mg Mass= 80 * 10^-6 kg. g = 9.8m/sq= 2* 10^-8.

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Answer 2

Since electric field is in horizontal direction and the bob is positively charged it ... qE/mg Mass= 80 * 10^-6 kg. g = 9.8m/sq= 2* 10^-8.