What are the five types of energy?

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Jasmine Grover

Education Journalist | Study Abroad Lead

There are different forms of energy that can be transformed from one to another. Energy can never be created or destroyed, it can only be transformed. The two most basic types of energy are potential energy and kinetic energy.

  • The energy that is present in things that move is known as kinetic energy. 
  • Examples of kinetic energy include mechanical and electrical energy.
  • The energy stored in objects that can be used in the future is known as potential energy.
  • Examples of potential energy include chemical and nuclear energy.

Types of Energy

The five different types of energy are as follows:

  1. Electrical Energy

Electrons are tiny particles that along with protons and neutrons form atoms. The movement of these electrons is known as electrical energy. When the electrons move through a wire, it is known as electricity.

  1. Chemical Energy

The energy that holds atoms and molecules together is known as chemical energy. The energy is stored in the bonds. It is also found in biomass, natural gas, food, and petroleum.

  1. Mechanical Energy

Mechanical energy is the energy stored in different objects. More energy is stored in the objects as they move faster. Examples of mechanical energy include wind, a moving car, or a running person.

  1. Thermal Energy

The energy created from the vibration of atoms and molecules of a substance is known as thermal energy. The faster the atoms move, the more energy they have, and thus the objects become hotter. It is also called heat energy.

  1. Nuclear Energy

The energy stored in the nucleus of atoms is known as nuclear energy. When the nuclei combine through fusion or split apart through fission, nuclear energy is released.

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CBSE CLASS XII Related Questions

  • 1.
    A charged particle $+q$ in an electric field $\vec{E}$ experiences a force in the direction of the electric field. As a result, its kinetic energy changes. Similarly, the charged particle also experiences a force when it moves in a magnetic field $\vec{B}$. But this magnetic force is perpendicular to both velocity $\vec{v}$ of the charged particle and the magnetic field $\vec{B}$, so it cannot change the kinetic energy of the charged particle. Consider two charged particles 1 and 2 of masses $m$ and $\frac{m}{2}$ having charges $-q$ and $+2q$ respectively. They are accelerated from rest through the same potential difference $V$ and acquire kinetic energy $K_1$ and $K_2$. Then they enter in a region of uniform magnetic field $\vec{B}$ perpendicular to their velocities.


      • 2.
        An astronomical telescope consists of two converging lenses. One of them of large aperture and large focal length is called objective lens and the other one, of smaller focal length and smaller aperture is called the eyepiece. It is used to see distant objects which are not seen clearly with naked eyes. The image formed by the objective lens acts as an object for the eyepiece and the final image produced by the eyepiece is magnified.


          • 3.
            Write two advantages of reflecting telescope over refracting telescope.


              • 4.
                Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

                  • The total charge of the two spheres is conserved.
                  • Both spheres attain the same potential.
                  • The final potential of the system equals $\frac{1}{4\pi\epsilon_0} \frac{(q_1 + q_2)}{(r_1 + r_2)}$
                  • The final potential of the system equals $\frac{1}{4\pi\epsilon_0} \frac{(q_1 + q_2) (r_1 + r_2)}{r_1 r_2}$

                • 5.
                  With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.


                    • 6.
                      Consider a cylindrical conductor of length \( l \) and area of cross-section \( A \). Current \( I \) is maintained in the conductor and electrons drift with velocity \( \vec{v}_d \, (|\vec{v}_d| = \frac{eE}{m} \tau) \), where symbols have their usual meanings. Show that the conductivity of the material of the conductor is given by \[ \sigma = \frac{n e^2 \tau}{m}. \]

                        CBSE CLASS XII Previous Year Papers

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