Seven capacitors, each of capacitance $2\,\mu F$ are to be connected to obtain a capacitance of $10/11\,\mu F$ .Which of the following combinations is possible ?
$5$ in parallel $2$ in series
$4$ in parallel $3$ in series
$3$ in parallel $4$ in series
$2$ in parallel $5$ in series
If the distance between two equal point charge is doubled then what would happen to the force between them ?
A series combination of $n_1$ capacitors, each of value $C_1$, is charged by a source of potential difference $4\,V$. When another parallel combination $n_2$ capacitors, each of value $C_2$, is charged by a source of potential difference $V$, it has the same (total) energy store in it, as the first combination has. The value of $C_2$, in terms of $C_1$, is then
Two identical balls having like charges and placed at a certain distance apart repel each other with a certain force. They are brought in contact and then moved apart to distance equal to half their initial separation. The force of repulsion between them increases $4.5\,times$ in comparison with the initial value. The ratio of the initial charges of the balls is
The resultant capacitance between $A$ and $B$ in the fig. is.....$\mu F$
The force on a charge situated on the axis of a dipole is $F$. If the charge is shifted to double the distance, the new force will be