Definitions [6]
Definition: Solar Energy
The energy radiated out by the Sun is called solar energy.
Definition: Mechanical Energy
The energy possessed by a body due to its state of rest or of motion, is called mechanical energy. It is the sum of potential energy and kinetic energy.
Definition: Geo Thermal Energy
The energy released in nuclear disintegrations in the interior of Earth gets stored deep inside the Earth and is called geo thermal energy.
Definition: Light Energy
It is a form of energy in the presence of which other objects are seen.
Definition: Sound Energy
Vibrating body possesses mechanical energy capable of producing sound energy.
Definition: Chemical Energy
The energy possessed by the fossil fuels such as coal, petroleum and natural gas is called chemical energy (or fuel energy).
Key Points
Key Points: Conversion of Energies
- Mechanical energy → Electrical energy: In a generator, the kinetic energy of water rotates the turbine to produce electrical energy.
- Electrical energy → Mechanical energy: In an electric motor, electrical energy changes into mechanical energy.
- Electrical energy → Heat energy: In devices like a heater, oven, or geyser, current through a resistance wire produces heat energy.
- Heat energy → Electrical energy: A thermocouple converts heat energy into electrical energy.
- Electrical energy → Sound energy: In a loudspeaker or electric bell, electrical energy changes into sound energy.
- Sound energy → Electrical energy: A microphone converts sound energy into electrical energy.
- Chemical energy → Electrical energy: In an electric cell, chemical energy changes into electrical energy.
- Electrical energy → Light energy: In an electric bulb, electrical energy changes into heat and light energy.
- Light energy → Electrical energy: In a photoelectric cell or solar cell, light energy is converted into electrical energy.
- Chemical energy → Mechanical energy: In automobiles, chemical energy of petrol/diesel changes into mechanical energy.
Concepts [14]
- Force, displacement and work
- Energy
- The relationship between work and energy
- Forms of Energy > Solar Energy
- Forms of Energy > Mechanical Energy
- Forms of Energy > Geo Thermal Energy
- Forms of Energy > Light Energy
- Forms of Energy > Sound Energy
- Forms of Energy > Chemical Energy
- Conversion of Energies
- Energy Resources
- Energy Resources > Conventional energy resources or non-renewable energy resources
- Energy Resources > Non-conventional energy resources or renewable energy resources
- Energy saving and green energy
