Is the induced charge on the surface of metal or inside it ?
Select the correct statement about electric charge
What was found by Thales of Miletus ?
Why only electron can transfer from one body to another body in frictional electrics ?
How does electroscope work ?
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