What was found by Thales of Miletus ?
What is quantization of charge ? What is the reason of quantization ?
Five balls numbered $1$ to $5$ are suspended using separate threads. Pairs $(1, 2)$, $(2, 4)$ and $(4, 1)$ show electrostatic attraction, while pair $(2, 3)$ and $(4, 5)$ show repulsion. Therefore ball $1$ must be
Two objects are rubbed against each other, the nature of electric force, when they are placed at some distance is
How much positive and negative charge is there in a cup of water $(250\;gm)$?
One metallic sphere $A$ is given positive charge whereas another identical metallic sphere $B$ of exactly same mass as of $A$ is given equal amount of negative charge. Then