Chapter - 14
Sources of Energy
( āĻļāĻ্āϤিā§° āĻā§āϏ )
Exercises :-
( āĻŦ্āϝাāϝ়াāĻŽ :- )
1. A Solar Water Heater Cannot be Used to get hot Water on
( āĻā§°āĻŽ āĻĒাāύী āĻĒাāĻŦāϞৈ āϏৌā§° āĻĒাāύী āĻšিāĻাā§° āĻŦ্āĻ¯ā§ąāĻšাā§° āĻā§°িāĻŦ āύোā§ąাā§°ি )
(a) A Sunny day
( āĻāĻা ā§°'āĻĻā§° āĻĻিāύ )
(b) A Cloudy day
( āĻāĻা āĻĄাā§ąā§°ীāϝ়া āĻĻিāύ )
(C) A Hot day
( āĻāĻা āĻā§°āĻŽ āĻĻিāύ )
(d) A Winday day
( āĻāĻা āĻāĻāύāĻĄে āĻĻিāύ )
Answer:-
2. Which of the following is not an example of a bio-mass energy source?
( āύিāĻŽ্āύāϞিāĻিāϤ āĻোāύāĻো āĻৈā§ą-āĻā§° āĻļāĻ্āϤিāĻā§āϏ⧰ āĻāĻĻাāĻšā§°āĻŖ āύāĻšāϝ়? )
(a) wood
( āĻাāĻ )
(b) gobar-gas
( āĻোāĻŦā§°-āĻেāĻ )
(c) nuclear energy
( āĻĒাā§°āĻŽাāĻŖā§ąিāĻ āĻļāĻ্āϤি )
(d) coal
( āĻāϝ়āϞা )
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?
( āĻāĻŽি āĻŦ্āĻ¯ā§ąāĻšাā§° āĻā§°া āĻļāĻ্āϤিā§° āĻŦেāĻিāĻাāĻ āĻā§āϏে āϏāĻ্āĻিāϤ āϏৌā§° āĻļāĻ্āϤিāĻĒ্ā§°āϤিāύিāϧিāϤ্āĻŦ āĻā§°ে। āύিāĻŽ্āύāϞিāĻিāϤ āĻোāύāĻো āĻ ā§ąāĻļেāώāϤ āϏূā§°্āϝ⧰ āĻļāĻ্āϤিā§° āĻĒā§°া āĻāĻšā§°āĻŖ āĻā§°া āύāĻšāϝ়? )
(a) geothermal energy
( āĻূ-āϤাāĻĒীāϝ় āĻļāĻ্āϤি )
(b) wind energy
( āĻŦাāϝ়ু āĻļāĻ্āϤি )
(c) nuclear energy
( āĻĒাā§°āĻŽাāĻŖā§ąিāĻ āĻļāĻ্āϤি )
(d) bio-mass.
( āĻৈā§ą-āĻā§°। )
Answer:-
4. Compare and contrast fossil fuels and the Sun as direct sources of energy.
( āĻীā§ąাāĻļ্āĻŽ āĻāύ্āϧāύ āĻā§°ু āϏূā§°্āϝāĻ āĻļāĻ্āϤিā§° āĻĒ্ā§°āϤ্āϝāĻ্āώ āĻā§āϏ āĻšিāĻাāĻĒে āϤুāϞāύা āĻā§°ু āĻŦিāĻĒā§°ীāϤ āĻā§°āĻ। )
Answer:-
5. Compare and contrast bio-mass and hydro electricity as sources of energy.
( āĻļāĻ্āϤিā§° āĻā§āϏ āĻšিāĻাāĻĒে āĻৈā§ą-āĻā§° āĻā§°ু āĻāϞāĻŦিāĻĻ্āϝুāϤ⧰ āϤুāϞāύা āĻā§°ু āĻŦিāĻĒā§°ীāϤ। )
Answer:-
6. What are the limitations of extracting energy from
( āĻāϝ়াā§° āĻĒā§°া āĻļāĻ্āϤি āĻāĻšā§°āĻŖāĻā§°াā§° āϏীāĻŽাāĻŦāĻĻ্āϧāϤা āĻŦোā§° āĻি )
(a) the wind?
( āĻŦāϤাāĻš? )
(b) waves?
( āĻĸৌ? )
(c) tides?
( āĻোā§ąাā§°? )
Answer::-
7. On what basis would you classify energy sources as
( āĻāĻĒুāύি āĻিāĻšā§° āĻিāϤ্āϤিāϤ āĻļāĻ্āϤিā§° āĻā§āϏāĻŦোā§°āĻ āĻāύেāĻĻā§°ে āĻļ্ā§°েāĻŖীāĻŦāĻĻ্āϧ āĻā§°িāĻŦ )
(a) renewable and non-renewable?
( āĻ¨ā§ąীāĻā§°āĻŖāϝোāĻ্āϝ āĻā§°ু āĻ -āĻ¨ā§ąীāĻā§°āĻŖāϝোāĻ্āϝ? )
(b) exhaustible and inexhaustible?
( āĻ্āϞাāύ্āϤ āĻā§°ু āĻ āĻļেāώ? )
Are the options given in (a) and (b) the same?
( āĻŦিāĻāϞ্āĻĒāĻŦোā§° (āĻ) āĻā§°ু (āĻ) āĻāĻে āύেāĻি? )
Answer:-
8. What are the qualities of an ideal source of energy?
( āĻļāĻ্āϤিā§° āĻāĻ āĻāĻĻā§°্āĻļ āĻā§āϏ⧰ āĻুāĻŖাāĻুāĻŖāĻŦোā§° āĻি? )
Answer:-
9. What are the advantages and disadvantages of using a solar cooker? Are there places where solar cookers would have limited utility?
( āϏৌā§° āĻুāĻাā§° āĻŦ্āĻ¯ā§ąāĻšাā§° āĻā§°াā§° āϏুāĻŦিāϧা āĻā§°ু āĻ āϏুāĻŦিāϧাāĻŦোā§° āĻি? āĻāύে āĻিāĻুāĻŽাāύ āĻ াāĻ āĻāĻে āύেāĻি āϝ'āϤ āϏৌā§° āĻুāĻাā§°ā§° āϏীāĻŽিāϤ āĻāĻĒāϝোāĻিāϤা āĻĨাāĻিāĻŦ? )
Answer:-
10. What are the environmental consequences of the increasing demand for energy? What steps would you suggest to reduce energy consumption?
( āĻļāĻ্āϤিā§° āĻŦā§°্āϧিāϤ āĻাāĻšিāĻĻাā§° āĻĒাā§°িāĻĒাā§°্āĻļ্āĻŦিāĻ āĻĒā§°িāĻŖাāĻŽ āĻি? āĻļāĻ্āϤিā§° āĻŦ্āĻ¯ā§ąāĻšাā§° āĻš্ā§°াāϏ āĻā§°িāĻŦāϞৈ āĻāĻĒুāύি āĻি āĻĒāĻĻāĻ্āώেāĻĒā§° āĻĒā§°াāĻŽā§°্āĻļ āĻĻিāĻŦ? )
Answer:-