Question

(a)Explain the underlying principle of working of a parallel plate capacitor. If two similar plates, each of area ‘A’ having surface charge densities ‘+ ’ & ‘-’ are separated by a distance ‘d’ in air, write expressions for (i) the electric field at points between the two plates, (ii) the capacity of the capacitor so formed.
(b)A parallel plate capacitor is charged by a battery and the battery remains connected, a dielectric slab is inserted in the space between the plates. Explain what changes if any , occur in the values of
(i)potential difference between the plates, (ii) energy stored in the capacitor.
(ii)electric field between the plates,

Answer 1

Answer:

If two similar plates, each of area A having surface charge densities and are separated by a distance +sigma to -sigma d in air, write expressions for (i) the electric field at points between the two plates. (ii) the potnetial difference between the plates. (iii) the capacitance of the capacitor so formed.