Types of Energy Questions - Practice Questions with Answers & Explanations (2024)

The capacity to do work is known as energy. Energy is a scalar quantity, and the SI unit of energy is the joule. Energy is classified into two types: potential energy and kinetic energy. Potential energy is defined as the energy stored in an object or system of objects. Kinetic energy is the energy in moving objects or mass. It is given by the formula: 1/2mv^2. Where m = mass of the object and v = velocity of the object. Types of kinetic energy are mechanical energy, electrical energy, radiant energy, thermal energy, and sound energy. The potential energy can be transformed into kinetic energy.

The potential energy formula is given by:

PE=m*g*h

Where m = mass of the object (in kilograms), g = Acceleration due to gravity, h = Height in meters.

Different types of potential energy include gravitational potential energy, elastic potential energy, chemical potential energy, and electric potential energy.

Different Types of Energy

• Mechanical energy is the energy associated with the motion and the position of an object.
• Radiant energy is the energy that travels in the form of a wave or particle. Sunlight is an example of radiant energy.
• Thermal energy is experienced in the form of heat or warmth.
• Geothermal energy is generated from the decay of natural minerals and the volcanic action of the earth.
• The flow of electrons in a circuit results in electricity production, referred to as electrical energy.

Energy can be classified as renewable energy and non-renewable energy based on energy sources. Examples of renewable resources are solar, geothermal, wind, and water. Examples of non-renewable energy are natural gas, coal, and fossil fuels like oils.

Important Types of Energy Questions with Answers

1. Energy Conservation Day is celebrated on _____

1. January 14th
2. March 14th
3. August 14th
4. December 14th

Answer: December 14th

Explanation: Energy Conservation Day has been celebrated on December 14th since 1991.

2. Which of the following consumes more energy?

1. Compact Fluorescent Lamps (CFLs)
2. Light Emitting Diode (LED) bulbs
3. Incandescent electric bulbs
4. Fluorescent tube-lights

Answer: c) Incandescent electric bulbs

Explanation: Among the listed devices, Light Emitting Diode (LED) bulbs consume the least energy, and incandescent electric bulbs consume more power.

3. Choose YES or No: Can energy be transformed from one form to another?

1. YES
2. NO

Answer: a) YES

Explanation: Energy can be transformed from one form to another. The best example to explain is using the solar panel, where sunlight is converted into electrical energy.

4. Shafts in the windmill aid in converting mechanical energy into _____?

1. Chemical energy
2. Solar energy
3. Electrical energy
4. Thermal energy

Answer: c) Electrical energy

5. ______ formula gives the potential energy.

1. m+h+g
2. m*g*h
3. m+g-h
4. mg/2h

Answer: b) m*g*h

Explanation: Potential energy is stored in an object and is measured by the amount of work done. The formula gives it PE=m*g*h.

6. Choose the right answer: Wind is the form of ______ energy

1. Renewable energy
2. Non-renewable energy

Answer: a) Renewable energy

Explanation: Since wind is not exhausted upon usage, the wind is considered renewable energy.

7. What is the formula to calculate mechanical energy?

Mechanical energy is given by the formula: Mechanical Energy = Kinetic Energy + Potential Energy.

Mechanical energy = 1/2mv^{2}+mgh

8. List three types of non-renewable resources of energy.

Three types of non-renewable resources are Fossil fuels like oil, natural gas and coal.

9. To convert sound energy into electrical energy, which device is used?

1. Micro oven
2. Refrigerator
3. Microphones
4. Compact Fluorescent Lamps (CFLs)

Answer: c) Microphones

Explanation: Microphones are used to convert sound energy into electrical energy.

10. The SI unit of energy is _____

1. Volts
2. Watts
3. Joule
4. Radians

Answer: c) Joule

Explanation: Joule is the SI unit of energy.

Practice Questions

1. List various types of kinetic energy.
2. Define energy.
3. What is meant by chemical energy?
4. How is geothermal energy generated?
5. State the law of conservation of energy.

See the video below to know about work, power, and energy.

Know the difference between potential energy and kinetic energy by watching the video below.