Question

22. Define Equipotential Surface.

23. Write notes on electric potential energy and mechanical energy.

24. Write differences between Capacitor and Capacitance.

25. Explain about the energy produced in a Capacitor.

Answer 1

22) Any surface over which the potential is constant is called an equipotential surface.In other words, the potential difference between any two points on an equipotential surface is zero.

23) Mechanical energy: The energy acquired by the objects upon which work is done is known as mechanical energy. Mechanical energy is the energy that is possessed by an object due to its motion or due to its position. Mechanical energy can be either kinetic energy (energy of motion) or potential energy (stored energy of position).

Electric potential energy: The electric potential energy of a system of point charges is defined as the work required assembling this system of charges by bringing them close together, as in the system from an infinite distance.

24) Capacitor is the device in which energy can be stored in the form of electric field but Capacitance is a measure of the electrical charge stored (in a capacitor).

25) When we connect a battery across the two plates of a capacitor, it gets charged. The potential difference gradually increases across the two plates and the battery had to do more work to deliver the same amount of charge due to the continuous increase in potential difference.

Energy stored in a capacitor is given by

U=0.5CV^2