Find an expression for the energy of a charged capacitor.

Why is an insulator sometimes called a dielectric? What is the main difference between free and bound charge? Generally one of the two plates of a Capacitor System is earthed, why? Derive the expression for the energy stored in a charged capacitor.

Find an expression for the total kinetic energy of a rolling body.

A charged particle enters a magnetic field with a velocity v in a direction perpendicular to the field. Find an expression for the radius of the circular path of the particle.

Write an expression for the kinetic energy of an object.

Deduce the expression of energy stored in a capacitor.

Derive an expression for potential energy of a stretched elastic spring.