What are called electrically charged and electrically neutral bodies ?
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
Mention the $SI$ unit and value of fundamental charge. Write its smaller units.
Write unit and value of fundamental electric charge.
When a glass rod is rubbed with silk, it
Give difference between charge and mass.