Deduce the expression for the capacity of a parallel plate condenser.

A parallel plate capacitor has plate separation "d" and the area of each plate is "A". The space between the plates is completely filled with a dielectric of constantK. Derive the expression for the capacity of the parallel plate capacitor.

Deduce the expression tau=PxxE

Deduce the expression for the voltage gain, A of a amplifier.

Deduce the expression of energy stored in a capacitor.

(Attempt any nine of the following questions) The capacity of a parallel plate capacitor with air is 18pF. When a dielectric material is inserted in the space between the plates, its capacity becomes 108. pF. Calculate the per mittivity of the material. What is the material?