Tag: physics

Questions Related to physics

Which of these is not related to energy efficiency?

physics save energy types of sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy

  1. Useful energy

  2. $kW$

  3. Heat

  4. Energy transformation

Show answer
Correct Option: B
Explanation:

Energy efficiency measures how much of energy is put into device to do intended job. So, it is related to useful energy, heat and energy transformation.
$kW$ or kilowatts are unit used to measure amount of electric power.

Which of following is not a renewable source of energy?

physics save energy types of sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy

  1. Geothermal

  2. Propane

  3. Solar

  4. Wind

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Correct Option: B
Explanation:

Propane was formed millions of years ago by decay of dead tiny plants and animals that sank to the bottom of ocean. It is in limited in supply.

Production of electricity by wave energy requires:

physics save energy types of sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy

  1. extremely strong pipes to carry sea water in huge waves.

  2. devices to trap wave energy for rotation of turbine.

  3. devices to boil sea water in waves.

  4. all of the above.

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Correct Option: B
Explanation:

Wave energy requires devices to trap the energy. A wide variety of devices have been developed to trap wave energy for rotation of turbine and production of electricity.

In thermal power plants:

physics save energy types of sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy

  1. heat energy is converted to electrical energy.

  2. heat energy is converted to light energy.

  3. electrical energy is converted to heat energy.

  4. heat energy is converted to wind energy.

Show answer
Correct Option: A
Explanation:

Thermal power plants convert heat energy to electrical energy.

Electricity produced by flowing water is called:

physics save energy types of sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy

  1. Wind energy farm

  2. Nuclear power

  3. Water power

  4. None of these

Show answer
Correct Option: D
Explanation:

Electricity produced by flowing water is known as hydroelectric power.

Which of the following is not true for non-renewable sources of energy?

physics save energy types of sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy

  1. Present in a limited quantity in nature

  2. Not replenished by any natural process

  3. Are inexhaustible

  4. None of these

Show answer
Correct Option: C
Explanation:

Non renewable sources of energy are exhausted by natural human activities over a certain period of time.

Which of the following is renewable source of energy?

physics save energy types of sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy

  1. Nuclear fuels

  2. Natural gas

  3. Fossil fuels

  4. Geothermal energy

Show answer
Correct Option: D
Explanation:

Geothermal energy is renewable source of energy as it is unexhaustible.

Sequence of energy conversion in a thermal power plant is:
P) Heat energy Q) Electrical energy R) Mechanical energy

physics save energy types of sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy

  1. $P\rightarrow Q\rightarrow R$

  2. $P\rightarrow R\rightarrow Q$

  3. $R\rightarrow Q\rightarrow P$

  4. $Q\rightarrow R\rightarrow P$

Show answer
Correct Option: B
Explanation:

Sequence of energy conversion is Heat energy $\rightarrow$ Mechanical energy $\rightarrow$ Electrical energy.

Which of the following energies is used for generating electricity?

physics save energy types of sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy

  1. Solar energy

  2. Nuclear energy

  3. Wind energy

  4. All of these

Show answer
Correct Option: D
Explanation:

Solar energy, Nuclear energy, Wind energy, all are used for generating electricity.

Which of the following is a classification of sources of energy?

physics save energy types of sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy

  1. Conventional and Non - Conventional

  2. Mechanical and Electrical

  3. Potential and Kinetic energy

  4. None of these

Show answer
Correct Option: A
Explanation:

Sources of energy can be classified as conventional/non-renewable or non-conventional/renewable sources of energy.