Obtain the expression for energy stored in a capacitor C in terms of charge Q on
it








Energy transformed



Average of potencial diffrence

So we can say that energy stored in the capacitor is equal to of the narrowstrip on the diagram above.












Answer:
Ideal capacitor in theory will have the same energy stored as charge. Just in practice to count energy stored in capacitor we have to multiply charge Q by half energy supplied. Just because of the resistance in the circuit, half of the energy will change to heat.