Question: Q. 26. (i) Deduce the expression for the electrostatic energy stored in a capacitor of capacitance ’
(ii) How will the (a) energy stored and (b) the electric field inside the capacitor be affected when it is completely filled with a dielectric material of dielectric constant ’
U] [O.D. I, II, III 2012]
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Solution:
Ans. (i) Expression of electrostatic energy stored in a capacitor
(ii) Effect on energy stored and electric field in capacitor due to dielectric material. Potential difference between the plates of capacitor
Work done in adding an additional charge
When battery is disconnected:
(a) Energy stored will be decreased or energy stored
(b) Electric field would decrease.
[CBSE Marking Scheme 2012]
