Question 406: Electrostats & Capacitance

Question

A capacitor C1 of capacitance 5 $$\mu$$F is charged to a potential of 30 V using a battery. The battery is then removed and the charged capacitor is connected to an uncharged capacitor C2 of capacitance 10 $$\mu$$F as shown in figure. When the switch is closed charge flows between the capacitors. At equilibrium, the charge on the capacitor C2 is __________ $$\mu$$C.

Accepted Answer

Let the charge q is flown in the circuit.
So using Kirchhoff's law,
$${q \over {10}} = {{150 - q} \over 5}$$
$$q = 100\,\mu C$$

Electrostats & Capacitance

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