Class 12 NEET Physics Electrostatics Questions Part 1

Capacitance of a parallel plate capacitor is
C=

ε0A

d

...(i)
Potential difference between the plates is V=Ed ...(ii)
The energy stored in the capacitor is
U=

1

2

CV2=

1

2

(

ε0A

d

)(Ed)2 (Using (i) and (ii))
=

1

2

ε0E2Ad