Question

The outer cylinders of two cylindrical capacitors of capacitance $2.2\mu F$ each, are kept in contact and the inner cylinders are connected through a wire. A battery of emf 10 V is connected as shown in figure (31-E5). Find the total charge supplied by the battery to the inner cylinders.

Answer 1

The capacitance of the outer sphere

$C=2.2\mu F,$

Potential, $V=10V$

Let the charge given to individual cyclinder Q

$Q=C\times V$

$=2.2\times 10=22\mu C$

The total charge given to the inner cylinder

$=22+22=44\mu F$