Chapter 14
āĻ āϧ্āϝাāϝ় ā§§ā§Ē
Sources of Energy
āĻļāĻ্āϤিā§° āĻā§āϏ
EXERCISES
āĻŦ্āϝাāϝ়াāĻŽ
1. A solar water heater cannot be uses to get hot water on
ā§§/ āĻā§°āĻŽ āĻĒাāύী āϞāĻাāĻŦāϞৈ āϏৌā§° ā§ąাāĻাā§° āĻšিāĻাā§° āĻŦ্āĻ¯ā§ąāĻšাā§° āĻā§°িāĻŦ āύোā§ąাā§°ি
(a) a sunny day. (b) a cloudy day.
(āĻ) āĻāĻা ā§°’āĻĻāĻাāĻ āĻĻিāύ। (āĻ) āĻāĻা āĻĄাā§ąā§°ীāϝ়া āĻĻিāύ।
(c) a hot day. (d) a windy day.
(āĻ) āĻāĻা āĻā§°āĻŽ āĻĻিāύ। (āĻ) āĻŦāϤাāĻšā§° āĻĻিāύ।
Ans-
2. Which of the following is not an example of a bio-mass energy source?
⧍) āϤāϞ⧰ āĻোāύāĻো āĻৈā§ą-āĻā§° āĻļāĻ্āϤিā§° āĻā§āϏ⧰ āĻāĻĻাāĻšā§°āĻŖ āύāĻšāϝ়?
(āĻ) āĻাāĻ (āĻ) āĻোāĻŦā§°-āĻেāĻ
(āĻ) āĻĒাā§°āĻŽাāĻŖā§ąিāĻ āĻļāĻ্āϤি (āĻ) āĻāϝ়āϞা
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?
ā§Š/ āĻāĻŽি āĻŦ্āĻ¯ā§ąāĻšাā§° āĻā§°া āĻļāĻ্āϤিā§° āĻŦেāĻিāĻাāĻ āĻā§āϏāĻ āϏংā§°āĻ্āώিāϤ āϏৌā§°āĻļāĻ্āϤিāĻ āĻĒ্ā§°āϤিāύিāϧিāϤ্āĻŦ āĻā§°ে। āϤāϞ⧰ āĻোāύāĻো āĻļেāώāϤ āϏূā§°্āϝ্āϝ⧰ āĻļāĻ্āϤিā§° āĻĒā§°া āĻāĻšā§°āĻŖ āĻā§°া āύāĻšāϝ়?
(āĻ) āĻূāϤাāĻĒীāϝ় āĻļāĻ্āϤি (āĻ)āĻŦাāϝ়ু āĻļāĻ্āϤি
(āĻ) āĻĒাā§°āĻŽাāĻŖā§ąিāĻ āĻļāĻ্āϤি (āĻ) āĻৈā§ąāĻŦāϏ্āϤু।
4. Compare and contrast fossil fuels and the Sun as direct sources of energy.
ā§Ē) āĻীā§ąাāĻļ্āĻŽ āĻāύ্āϧāύ āĻā§°ু āϏূā§°্āϝ্āϝāĻ āĻļāĻ্āϤিā§° āĻĒ্ā§°āϤ্āϝāĻ্āώ āĻā§āϏ āĻšিāĻাāĻĒে āϤুāϞāύা āĻā§°ু āĻŦিāĻĒā§°ীāϤāĻŽুāĻী āĻā§°া।
5. Compare and contrast bio-mass and hydro electricity as sources of energy.
ā§Ģ) āĻৈā§ą-āĻā§° āĻā§°ু āĻāϞāĻŦিāĻĻ্āϝুā§ āĻļāĻ্āϤিā§° āĻā§āϏ āĻšিāĻাāĻĒে āϤুāϞāύা āĻā§°ু āĻŦিāĻĒā§°ীāϤāĻŽুāĻী āĻā§°া।
Ans-
6. What are the limitations of extracting energy from
ā§Ŧ/ āĻļāĻ্āϤি āĻāĻšā§°āĻŖ āĻā§°াā§° āĻি āĻি āϏীāĻŽাāĻŦāĻĻ্āϧāϤা āĻāĻে
(āĻ) āĻŦāϤাāĻš? (āĻ) āϤ⧰ংāĻ?
(c) tides?
(āĻ) āĻোā§ąাā§°-āĻাāĻা?
7. On what basis would you classify energy sources as
ā§) āĻāĻĒুāύি āĻļāĻ্āϤিā§° āĻā§āϏāϏāĻŽূāĻšāĻ āĻি āĻিāϤ্āϤিāϤ āĻļ্ā§°েāĻŖীāĻুāĻ্āϤ āĻā§°িāĻŦ
(a) renewable and non-renewable?
(āĻ) āύāĻŦীāĻā§°āĻŖāϝোāĻ্āϝ āĻā§°ু āĻ āύāĻŦীāĻā§°āĻŖāϝোāĻ্āϝ?
(b) exhaustible and inexhaustible?
(āĻ) āĻ্āώāϝ় āĻā§°ু āĻ āĻ্āώāϝ়?
Are the options given in (a) and (b) the same?
(āĻ) āĻā§°ু (āĻ)āϤ āĻĻিāϝ়া āĻŦিāĻāϞ্āĻĒāϏāĻŽূāĻš āĻāĻে āύেāĻি?
ā§Ž) āĻļāĻ্āϤিā§° āĻāĻĻā§°্āĻļ āĻā§āϏ⧰ āĻুāĻŖ āĻি āĻি?
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 āϏুāĻŦিāϧা āĻি āĻি? āĻāύেāĻুā§ąা āĻ াāĻ āĻāĻেāύে āϝ’āϤ āϏৌā§° āĻুāĻাā§°ā§° āĻāĻĒāϝোāĻিāϤা āϏীāĻŽিāϤ āĻš’āϞāĻšেঁāϤেāύ?
10. What are the environmental consequences of the increasing demand for energy? What steps would you suggest to reduce energy consumption?
ā§§ā§Ļ) āĻļāĻ্āϤিā§° āĻŦā§°্āϧিāϤ āĻাāĻšিāĻĻাā§° āĻĒā§°িā§ąেāĻļā§° āĻāĻĒā§°āϤ āĻি āĻি āĻĒā§°িāĻŖāϤি āĻš’āĻŦ? āĻļāĻ্āϤিā§° āĻŦ্āĻ¯ā§ąāĻšাā§° āĻš্ā§°াāϏ āĻā§°িāĻŦāϞৈ āĻāĻĒুāύি āĻি āĻি āĻĒāĻĻāĻ্āώেāĻĒ āϞ’āĻŦāϞৈ āĻĒā§°াāĻŽā§°্āĻļ āĻĻিāĻŦ?