Two charges each of $1\;coulomb$ are at a distance $1\,km$ apart, the force between them is
$9 \times {10^3}\;Newton$
$9 \times {10^{ - 3}}\;Newton$
$1.1 \times {10^{ - 4}}\;Newton$
${10^4}\;Newton$
Two point charges $ + 3\,\mu C$ and $ + 8\,\mu C$ repel each other with a force of $40\,N$. If a charge of $ - 5\,\mu C$ is added to each of them, then the force between them will become....$N$
A charge $q$ is placed at the centre of the line joining two equal charges $Q$. The system of the three charges will be in equilibrium, if $q$ is equal to
Similar charges are placed at corners of a square and a charge $q_0$ is placed at it's centre find net force on it
Write some important points for vector form of Coulomb’s law.
The magnitude of electric force on $2\, \mu \,C$ charge placed at the centre $O$ of two equilateral triangles each of side $10 \,cm$, as shown in figure is $P$. If charge $A, B, C, D, E$ and $F$ are $2\, \mu \,C, 2\, \mu \,C, 2\, \mu \,C,-2\, \mu \,C, -2\, \mu \,C, -2\, \mu \,C$ respectively, then $P$ is :.....$N$