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Electrostatic Potential And Capacitance

Question

Net capacitance of three identical capacitors in series is 1 $straight mu$ F. What will be their net capacitance if connected in parallel?
Find the ratio of energy stored in the two configurations if they are both connected to the same source.

Solution

Let,C be the capacitance of each capacitor,

In a series combination,

When these capacitors are connected in parallel, net capacitance, C_P = 3 C = 33 = 9F

Ration of energy stored is given by,