201224

Question : The energy stored C4 is 27 J. Calculate the total energy in the system.

Doubt by Krish

Solution : 

First Find Voltage across C4 by using the formula 1/2CV². This voltage will be same across all of them except C1. 

Then Find C234 and use this voltage to calculate sum of charges across C2, C3, C4. 

Then Q=CV to find the voltage across C1 and then Find Total Voltage and Total Capacitance and hence the total electrostatic energy of the system.  

Detailed Solution is coming soon.