Tag: save energy

Questions Related to save energy

Which form of energy is harnessed by a turbine to convert it into an electrical
energy?

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

  1. Light energy

  2. Mechanical energy

  3. Chemical energy

  4. Thermal energy

Show answer
Correct Option: B
Explanation:

Rotation of the turbine (mechanical energy) is used for the generation of electricity (electrical energy).

Which of the following is a characteristic of wind energy?

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

  1. Renewable source.

  2. Non renewable source.

  3. Not echo friendly.

  4. Costly.

Show answer
Correct Option: A
Explanation:

Advantages of the wind energy are as follows:

1. Clean source of energy.
2. It is renewable source of energy.
3.Echo-friendly as creates no pollution.
4.Cost efficient as naturally available and easy to harness.

Which one of the following is a renewable resource?

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

  1. Natural gas

  2. Petroleum

  3. Wind

  4. Coal

Show answer
Correct Option: C
Explanation:

Coal, natural gas and petroleum forms the fossil fuels. Fossil fuels are non-renewable source of energy. Wind is a renewable source of energy.

State whether the given statement is True or False :
Solar panels converts light energy to mechanical energy.

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

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

Solar panels converts light energy to Electrical energy.

State whether the given statement is True or False :

Non conventional sources of energy are cheaper than conventional sources of energy in most of the cases. 

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

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

Cheaper and Renewable: Most of the Non-conventional Power resources are cheaper and renewable as compared to conventional source.Solar energy,wind energy are much cheaper than fuel,coal etc.


 Scarcity of Fossil Fuels: The overall limitation and scarcity of fossil fuels has given rise to the urgent need for exploiting alternative energy source.

What term is known as when the solar energy fall on the Earth's atmosphere exposed perpendicularly to the rays of the Sun at the average distance between the Sun and Earth?

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

  1. Solar panel

  2. Solar Constant

  3. Solar Time

  4. Solar Energy

Show answer
Correct Option: B
Explanation:

Solar constant is defined as the rate at which per unit area of the Earth's atmosphere receives the Sun's energy, when the Sun is at the mean distance from the Earth. Value is about 1388 watts per square metre.

What are hot spots?

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

  1. Molten rock in the earths crust is pushed upward and trapped in certain regions

  2. Solid rock in the earths crust is pushed upward and trapped in certain regions

  3. Molten rock in the earths crust is pushed downward and trapped in certain regions

  4. Solid rock in the earths crust is trapped in certain regions

Show answer
Correct Option: A
Explanation:
Geothermal energy is the energy stored in the earth as heat. It can be harnessed only from a few places on earth called as geothermal hotspots. In these hotspots, molten rock in the earths crust is pushed upward and trapped in certain regions.

Out of the following which one is not a unconventional source of energy ?

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

  1. Tidal power

  2. Geothermal energy

  3. Nuclear energy

  4. Wind power

Show answer
Correct Option: C

Live storage of coal in a power plant means 

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

  1. coal ready for combustion

  2. preheated coal

  3. storage of coal sufficient to meet 24 hour demand of the plant

  4. coal in transit

Show answer
Correct Option: C
Explanation:

Live storage of coal in power plants means sufficient storage of coal to meet 24 hour demand of the plant.

Water gas is a mixture of -

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

  1. $CO _2 and O _2$

  2. $O _2and H _2$

  3. $H _2, N _2 and O _2$

  4. $CO, N _2 and H _2$

Show answer
Correct Option: D
Explanation:

Water gas is produced from synthesis gas, which is composed of carbon monoxide and hydrogen