defence exam BSF Head Constable (RO/RM) Mock Test 2023 Electromagnetic Theory Electrostatics Electrostatic Field
Take a glass rod, rub it with silk and hang it from a long silk thread. Take another glass rod, rub with silk and hold it near the rubbed end of the first rod. What happens to the rods?
1
They repel each other.
2
They attract each other.
3
They obey the inverse square law.
4
They fall down.