Three identical charged balls each of charge $2 \,C$ are suspended from a common point $P$ by silk threads of $2 \,m$ each (as shown in figure). They form an equilateral triangle of side $1 \,m$.
The ratio of net force on a charged ball to the force between any two charged balls will be ...........
$1: 1$
$1: 4$
$\sqrt{3}: 2$
$\sqrt{3}: 1$
Two charges each of $1\;coulomb$ are at a distance $1\,km$ apart, the force between them is
Why Coulombian force is called two body force ?
Equal charges $q$ are placed at the four corners $A,\,B,\,C,\,D$ of a square of length $a$. The magnitude of the force on the charge at $B$ will be
By using Coulomb’s law, define unit charge.
Two charges of equal magnitudes and at a distance $r$ exert a force $F$ on each other. If the charges are halved and distance between them is doubled, then the new force acting on each charge is