Explanation

• An electric generator is a device that converts mechanical energy into usable electrical energy.
• This process is based on the principle of electromagnetic induction.
• Discovered in 1831 by British scientist Michael Faraday.

Last verified on 27-04-2026

Explanation

• Coal is a non-renewable resource because it takes millions of years to form and cannot be replenished quickly.
• Pakistan uses coal for energy production, especially in power plants like the Thar coal project.

Non-renewable energy sources:

• Oil
  
• Nuclear energy
• Petroleum
• Natural gas & coal

Renewable sources of energy:

• Solar energy
• Wind energy
• Hydroelectric power
• Biomass energy
• Geothermal energy
• Tidal energy

Last verified on 11-02-2026

Explanation

• Kinetic energy is the energy an object possesses due to its motion.
• Any moving object, such as a car, a ball, or a person, has kinetic energy.
• The amount of kinetic energy an object has depends on its mass and velocity.

Last verified on 18-03-2026

Explanation

• Fuel stores energy in the form of chemical bonds.
• When fuel burns in the engine, this chemical energy is converted into mechanical energy to move the car.
• Gasoline, diesel, and natural gas are common fuels storing chemical energy.
• The process of burning fuel to release energy is called combustion.

Last verified on 15-03-2026

Explanation

Non-renewable energy sources:

• Oil
  
• Nuclear energy
• Petroleum
• Natural gas & coal

Renewable sources of energy:

• Solar energy
• Wind energy
• Hydroelectric power
• Biomass energy
• Geothermal energy
• Tidal energy

Last verified on 11-02-2026