Three circuits, each consisting of a switch ‘S’ and two capacitor… - Vidyadip

Question

Three circuits, each consisting of a switch ‘S’ and two capacitors, are initially charged, as shown in the figure. After the switch has been closed, in which circuit will the charge on the left-hand capacitor (i) increase, (ii) decrease and (iii) remain same? Give reasons.

✓

Answer

$V_L = 3?$	$V_R = 3?$	(L: Left, R: Right)
$V_L = 6?$	$V_R = 3?$
$V_L = 2?$	$V_R= 3?$

Reasons:

No change – (potential same on both capacitors as $(V_L = V_R).$
Charge on left hand capacitor will decrease $(V_L > V_R).$
Charge on left hand capacitor will increase $(V_R > V_L).$

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