Question

Each capacitors in the circuit of given figure is $4\mu F$. When the switch S is closed how much charge will flow through AB?

• A. $320\mu C$
• B. $213\mu C$
• C. $107\mu C$
• D. none of these

Answer 1

Answer: (B)

$213\mu C$

Case (i) switch is open $Q=\frac{8\times 4}{12}\times 40=\frac{320}{3}\mu C$
case(ii) switch is closed:$Q=8\times 40=320\mu C$
Charge flowing through $AB=320-320/3=640/3\mu C$

$chargeflowingthroughAB=213\mu C$