Question

A parallel plate condenser with oil between the plates (dielectric constant of oil K = 2) has a capacitance C. If the oil is removed, then capacitance of the capacitor becomes(a) √2C(b) 2C(c) C/√2(d) C/2

Answer 1

Answer:

When oil is present, the capacitance C=dAKϵ0=d2Aϵ0 where A= area of plates and d= separation of plates and dielectric constant K=2

When oil is removed, the capacitance becomes C′=dAϵ0=2C