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
The value of electric potential at any point due to any electric dipole is
Electric field at a point varies as $r^o$ for
The resultant capacitance between $A$ and $B$ in the fig. is.....$\mu F$
The plates of a parallel plate capacitor are charged up to $100\, volt$. A $2\, mm$ thick plate is inserted between the plates, then to maintain the same potential difference, the distance between the capacitor plates is increased by $1.6\, mm$. The dielectric constant of the plate is
Two equal negative charges $-q$ are fixed at points $(0, -a)$ and $(0, a)$ in the $x-y$ plane. A positive charge $Q$ is released from rest at a point $(2a, 0)$. The charge $Q$ will