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In the given capacitors circuit applied potential between $a$ and $b$ is $220\; V$. What is the equivalent capacitance of the network between $a$ and $b$? Given $C_1 = C_5 = 8.4 \mu F$ and $C_2 = C_3 = C_4 = 4.2\mu F$.

A 300V battery is connected across capacitors of 3μF and 6μF in parallel. Calculate the energy stored in each capacitor.