An isolated metal sphere of radius is given a charge . The potential energy of the sphere is :
Two charges of and are separated by a distance of . The distance of the point from smaller charge where electric potential is zero if it lies between them is :
A cloud carries a charge of 1000C at a potential of 5 kV. If the cloud discharge, the amount of energy released:
A neutral hydrogen molecule has two protons and two electrons. If one of the electrons is removed we get a hydrogen molecular ion . In the ground state of the two protons are separated by roughly and the electrons is roughly from each proton. The potential energy of the system is :
(b) capacitors each of capacity are joined first in series and then in parallel. Write the value of product of equivalent capacitances.
(c) What will be the value of capacitance of a capacitor if a dielectric of dielectric constant is inserted fully between the plates of parallel plate capacitor.