Question

A bob of simple pendulum of mass 40 grams with a positive charge

Answer 1

the bob of a simple pendulum has a mass 40g and positive charge of 4.0 uc (uc=micro columb) it makes 20 oscillation in 45 sec.A vertical electric field pointing upwards and of magnitude 2.5*10n4N/C is switched on

Answer 2

Answer:

Answer is as follows. I hope it is useful. If you wish please make it in a brain list.