Maharashtra Board Solutions for Chapter: Electrostatics, Exercise 1: Can you recall?

Ever heard a crackling sound while taking out your sweater in winter?

Have you seen the lightning striking during pre-monsoon weather?

When a petrol or a diesel tanker is emptied in a tank, it is grounded .

A thick chain hangs from a petrol or a diesel tanker and it is in contact with ground when the tanker is moving.

Three charges, $q$ each, are placed at the vertices of an equilateral triangle. What will be the resultant force on charge $Q$ placed at the centroid of the triangle ?

Why a small voltage can produce a reasonably large electric field ?

Lines of force are imaginary, can they have any practical use?

The surface charge density of the earth is $\sigma =-1.33$ n C/m² which is about $8.3\times {10}^9$  electrons per square meter. If that is the case why don't we feel it ?