NCERT Class X Science Class: Chapter –14. Sources of Energy – Part-2

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Question 7:

Ocean thermal energy is due to

(a) Energy stored by waves in the ocean

(b) Temperature difference at different levels in the ocean

(c) Pressure difference at different levels in the ocean

(d) Tides arising out in the ocean

Answer: B

Image Ocean thermal energy

Image Ocean Thermal Energy

Question 8:

The major problem in harnessing nuclear energy is how to

(a) Split nuclei?

(b) Sustain the reaction?

(c) Dispose of spent fuel safely?

(d) Convert nuclear energy into electrical energy?

Answer: C

Question 9:

Which part of the solar cooker is responsible for greenhouse effect?

(a) Coating with black colour inside the box

(b) Mirror

(c) Glass sheet

(d) Outer cover of the solar cooker

Answer: C

Image The Greenhouse effect

Image the Greenhouse Effect

Question 10:

The main constituent of biogas is

(a) Methane

(b) Carbon dioxide

(c) Hydrogen

(d) Hydrogen supplied

Answer: A

Image Chemische Anteile Von Biogas

Image Chemische Anteile Von Biogas

Question 11:

The power generated in a windmill

(a) Is more in rainy season since damp air would mean more airmass hitting the blades

(b) Depends on the height of the tower

(c) Depends on wind velocity

(d) Can be increased by planting tall trees close to the tower

Answer: C

Image The power generated in a windmill

Image the Power Generated in a Windmill

Question 12:

Choose the correct statement

(a) Sun can be taken as an inexhaustible source of energy

(b) There is infinite storage of fossil fuel inside the earth

(c) Hydro and wind energy plants are nonpolluting sourcesof energy

(d) Waste from a nuclear power plant can be easily disposed off

Answer: A

Image An inexhaustible source of energy

Image an Inexhaustible Source of Energy

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