derive an expression for the energy stored in a parallel plate capacitor
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A charged capacitor is a store of electric potential energy.
To find the energy stored in a capacitor, let us consider the capacitor if a capacitance C, with a with a potential difference V between the plates.
There is a charge +q on one plate and -q on the other.
Potential of capacitor = q/c
Work done in giving additional charge dq to capacitor is
dW = q/C *dq
Total work done in giving a charge Q to the capacitor is q.
Q = Q
W= 1/C q2/2
To find the energy stored in a capacitor, let us consider the capacitor if a capacitance C, with a with a potential difference V between the plates.
There is a charge +q on one plate and -q on the other.
Potential of capacitor = q/c
Work done in giving additional charge dq to capacitor is
dW = q/C *dq
Total work done in giving a charge Q to the capacitor is q.
Q = Q
W= 1/C q2/2
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