Energy and Electronics 2nd Half, 1st Semester Lessons

FORMS OF ENERGY Lesson 1

What is ENERGY? Energy is the ability to do work. The unit of energy is joule (J).

KINETIC ENERGY Kinetic energy is the energy of an object due to its motion. All moving objects possess kinetic energy. The greater the mass and the speed of a moving object, the greater kinetic energy is.

POTENTIAL ENERGY Potential energy is the energy stored by objects due to its position or its condition. Gravitational Potential Energy Elastic Potential Energy

CHEMICAL ENERGY Chemical energy is the energy stored in substances such as food and fuels. It is released and converted into other forms of energy when the substances undergo chemical reactions.

SOUND ENERGY Sound energy is produced by vibrating objects. It can be transferred from one place to another in the form of waves through a medium such as gas, liquid, or solid.

HEAT ENERGY Energy usually found in hot objects. The hotter the object, the more energy it can give out.

LIGHT ENERGY Light energy is the energy radiated by luminous objects.

ELECTRICAL ENERGY Electrical energy consists of electric charges, which travel through electrical conductors. It is supplied in the form of electrical power by generators, batteries, dry cells, and solar cells.

NUCLEAR ENERGY Nuclear energy is the energy stored in the nucleus of an atom.

TEST YOURSELF

Answers Q1. Energy is the ability to do work. Q2. Kinetic energy Potential energy Heat energy Sound energy Electrical energy Nuclear energy Chemical energy Light energy