Theplates of a parallel plate capacitor have an area of 90 cm2each and

1.	Theplates of a parallel plate capacitor have an area of 90 cm2each and are separated by 2.5 mm. The capacitor is charged byconnecting it to a 400 V supply.(a) Howmuch electrostatic energy is stored by the capacitor?(b) Viewthis energy as stored in the electrostatic field between the plates,and obtain the energy per unit volume u.Hence arrive at a relation between uand the magnitude of electric fieldE betweenthe plates.
Answer» The plates of a parallel plate capacitor have an area of 90 cm² each and are separated by 2.5 mm. The capacitor is charged by connecting it to a 400 V supply. (a) How much electrostatic energy is stored by the capacitor? (b) View this energy as stored in the electrostatic field between the plates, and obtain the energy per unit volume u. Hence arrive at a relation between u and the magnitude of electric field E between the plates.

Theplates of a parallel plate capacitor have an area of 90 cm2each and are separated by 2.5 mm. The capacitor is charged byconnecting it to a 400 V supply.(a) Howmuch electrostatic energy is stored by the capacitor?(b) Viewthis energy as stored in the electrostatic field between the plates,and obtain the energy per unit volume u.Hence arrive at a relation between uand the magnitude of electric fieldE betweenthe plates.

Answer»

The
plates of a parallel plate capacitor have an area of 90 cm²
each and are separated by 2.5 mm. The capacitor is charged by
connecting it to a 400 V supply.

(a) How
much electrostatic energy is stored by the capacitor?

(b) View
this energy as stored in the electrostatic field between the plates,
and obtain the energy per unit volume u.
Hence arrive at a relation between u
and the magnitude of electric field
E between
the plates.

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