A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

Options

A. the samme
B. doubled
C. half
D. K times

Answer

A

Explanation

When the metal foil is introduced between the plates, the arrangement is equivalent of two capacitors each of plate separation d/2 arranged in series.

`therefore`Capacity of each capcitor=2C
`therefore`Resultant capacity `(I)=((2Cxx2C)/(2C+2C))=(4C^(2))/(4C)=C`