Chapter - 14 

Sources of Energy

( āĻļāĻ•্āϤিā§° āĻ‰ā§ŽāϏ )


Exercises :-

( āĻŦ্āϝাāϝ়াāĻŽ :- )

1. A Solar Water Heater Cannot be Used to get hot Water on

( āĻ—ā§°āĻŽ āĻĒাāύী āĻĒাāĻŦāϞৈ āϏৌā§° āĻĒাāύী āĻšিāϟাā§° āĻŦ্āĻ¯ā§ąāĻšাā§° āϕ⧰িāĻŦ āύোā§ąাā§°ি  )

(a) A Sunny day 

( āĻāϟা ā§°'āĻĻā§° āĻĻিāύ )

(b) A Cloudy day 

( āĻāϟা āĻĄাā§ąā§°ীāϝ়া āĻĻিāύ )

(C) A Hot day

( āĻāϟা āĻ—ā§°āĻŽ āĻĻিāύ )

(d) A Winday day 

( āĻāϟা āωāχāύāĻĄে āĻĻিāύ )

Answer:-

2. Which of the following is not an example of a bio-mass energy source?

( āύিāĻŽ্āύāϞিāĻ–িāϤ āĻ•োāύāϟো āϜৈā§ą-āĻ­ā§° āĻļāĻ•্āϤিāĻ‰ā§ŽāϏ⧰ āωāĻĻাāĻšā§°āĻŖ āύāĻšāϝ়? )

(a) wood

( āĻ•াāĻ  )

(b) gobar-gas

( āĻ—োāĻŦā§°-āĻ—েāĻ› )

(c) nuclear energy

( āĻĒাā§°āĻŽাāĻŖā§ąিāĻ• āĻļāĻ•্āϤি )

(d) coal

( āĻ•āϝ়āϞা )

Answer:-

3. Most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun's energy?

( āφāĻŽি āĻŦ্āĻ¯ā§ąāĻšাā§° āϕ⧰া āĻļāĻ•্āϤিā§° āĻŦেāĻ›িāĻ­াāĻ— āĻ‰ā§ŽāϏে āϏāĻž্āϚিāϤ āϏৌā§° āĻļāĻ•্āϤিāĻĒ্ā§°āϤিāύিāϧিāϤ্āĻŦ āϕ⧰ে। āύিāĻŽ্āύāϞিāĻ–িāϤ āĻ•োāύāϟো āĻ…ā§ąāĻļেāώāϤ āϏূā§°্āϝ⧰ āĻļāĻ•্āϤিā§° āĻĒā§°া āφāĻšā§°āĻŖ āϕ⧰া āύāĻšāϝ়? )

(a) geothermal energy

( āĻ­ূ-āϤাāĻĒীāϝ় āĻļāĻ•্āϤি )

(b) wind energy

( āĻŦাāϝ়ু āĻļāĻ•্āϤি )

(c) nuclear energy

( āĻĒাā§°āĻŽাāĻŖā§ąিāĻ• āĻļāĻ•্āϤি )

(d) bio-mass.

( āϜৈā§ą-āĻ­ā§°। )

Answer:-

4. Compare and contrast fossil fuels and the Sun as direct sources of energy. 

( āϜীā§ąাāĻļ্āĻŽ āχāύ্āϧāύ āφ⧰ু āϏূā§°্āϝāĻ• āĻļāĻ•্āϤিā§° āĻĒ্ā§°āϤ্āϝāĻ•্āώ āĻ‰ā§ŽāϏ āĻšিāϚাāĻĒে āϤুāϞāύা āφ⧰ু āĻŦিāĻĒā§°ীāϤ āϕ⧰āĻ•। )

Answer:-

5. Compare and contrast bio-mass and hydro electricity as sources of energy.

( āĻļāĻ•্āϤিā§° āĻ‰ā§ŽāϏ āĻšিāϚাāĻĒে āϜৈā§ą-āĻ­ā§° āφ⧰ু āϜāϞāĻŦিāĻĻ্āϝুāϤ⧰ āϤুāϞāύা āφ⧰ু āĻŦিāĻĒā§°ীāϤ। )

Answer:-

6. What are the limitations of extracting energy from

( āχāϝ়াā§° āĻĒā§°া āĻļāĻ•্āϤি āφāĻšā§°āĻŖāϕ⧰াā§° āϏীāĻŽাāĻŦāĻĻ্āϧāϤা āĻŦোā§° āĻ•ি )

(a) the wind?

( āĻŦāϤাāĻš? )

(b) waves?

( āĻĸৌ? )

(c) tides?

( āϜোā§ąাā§°? )

Answer::-

7. On what basis would you classify energy sources as

( āφāĻĒুāύি āĻ•িāĻšā§° āĻ­িāϤ্āϤিāϤ āĻļāĻ•্āϤিā§° āĻ‰ā§ŽāϏāĻŦোā§°āĻ• āĻāύেāĻĻā§°ে āĻļ্ā§°েāĻŖীāĻŦāĻĻ্āϧ āϕ⧰িāĻŦ )

(a) renewable and non-renewable?

( āĻ¨ā§ąীāϕ⧰āĻŖāϝোāĻ—্āϝ āφ⧰ু āĻ…-āĻ¨ā§ąীāϕ⧰āĻŖāϝোāĻ—্āϝ? )

(b) exhaustible and inexhaustible?

( āĻ•্āϞাāύ্āϤ āφ⧰ু āĻ…āĻļেāώ? )

Are the options given in (a) and (b) the same?

( āĻŦিāĻ•āϞ্āĻĒāĻŦোā§° (āĻ•) āφ⧰ু (āĻ–) āĻāĻ•ে āύেāĻ•ি? )

Answer:-

8. What are the qualities of an ideal source of energy?

( āĻļāĻ•্āϤিā§° āĻāĻ• āφāĻĻā§°্āĻļ āĻ‰ā§ŽāϏ⧰ āĻ—ুāĻŖাāĻ—ুāĻŖāĻŦোā§° āĻ•ি? )

Answer:-

9. What are the advantages and disadvantages of using a solar cooker? Are there places where solar cookers would have limited utility?

( āϏৌā§° āĻ•ুāĻ•াā§° āĻŦ্āĻ¯ā§ąāĻšাā§° āϕ⧰াā§° āϏুāĻŦিāϧা āφ⧰ু āĻ…āϏুāĻŦিāϧাāĻŦোā§° āĻ•ি? āĻāύে āĻ•িāĻ›ুāĻŽাāύ āĻ াāχ āφāĻ›ে āύেāĻ•ি āϝ'āϤ āϏৌā§° āĻ•ুāĻ•াā§°ā§° āϏীāĻŽিāϤ āωāĻĒāϝোāĻ—িāϤা āĻĨাāĻ•িāĻŦ? )

Answer:-

10. What are the environmental consequences of the increasing demand for energy? What steps would you suggest to reduce energy consumption?

( āĻļāĻ•্āϤিā§° āĻŦā§°্āϧিāϤ āϚাāĻšিāĻĻাā§° āĻĒাā§°িāĻĒাā§°্āĻļ্āĻŦিāĻ• āĻĒā§°িāĻŖাāĻŽ āĻ•ি? āĻļāĻ•্āϤিā§° āĻŦ্āĻ¯ā§ąāĻšাā§° āĻš্ā§°াāϏ āϕ⧰িāĻŦāϞৈ āφāĻĒুāύি āĻ•ি āĻĒāĻĻāĻ•্āώেāĻĒā§° āĻĒā§°াāĻŽā§°্āĻļ āĻĻিāĻŦ? )

Answer:-







Post ID : DABP004564