Two identical capacitors A and B are connected as shown in the circuit. Initially the switch ' S ' is closed. Now the switch is opened and the free space between the plates of the capacitors is filled with a dielectric of dielectric constant 3. The ratio of total electrostatic energy stored in the capacitors before and after introduction of the dielectric is
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Let the capacitance of each capacitor be C.
Total electrostatic energy stared in capacitor
Now dielectric introduces after penning the switch s.
Energy stored in 
.
Let the charge stared in capacitor B initially be Q. In an open circuit, the charge will remain same.
Energy stored in 
Total energy, 
Ratio, 
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