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Byju's Answer
Standard VII
Physics
Solar Energy
Solar energy ...
Question
Solar energy is:
A
Radiation of sun incident on Earth’s surface
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B
Solar rays reflected by moon towards earth
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C
Burning of coal to produce temperature comparable to sun’s
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D
None of these
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Solution
The correct option is
A
Radiation of sun incident on Earth’s surface
Solar energy is the solar radiation which is directly incident upon the Earth.
The solar radiation reflected by the moon cannot be used as the energy of them is very less.
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Similar questions
Q.
Fraction of total solar energy incident on earth, Which is used by producers:-
Q.
Solar energy is obtained from the radiation of the Sun which is incident on the Earth’s surface.
Q.
A surface of area
1
m
2
kept perpendicular to the sun rays absorbs
1.8
M
J
of solar energy in one hour.
(a) What is the amount of electrical energy produced when a solar panel of area
5
m
2
is exposed perpendicular to the sun rays for
5
h
. Take the efficiency of solar panel as 30%.
(b) Calculate the power generated in
k
W
.
Q.
The change in the value of acceleration of earth towards sun, when the moon comes from the position of solar eclipse to the position on the other
side of earth in line with sun is.
(mass of moon = 7.36 1022 kg, orbital radius of moon =
3.8
×
108
m.)
Q.
Solar constant is the amount of solar energy incident perpendicularly per unit time on unit surface area of the earth at an average distance between the Sun and the earth. Its value in
S
0
=
1340
w
/
m
2
. Here calculate temperature of the Sun's surface.
Radius of the Sun
R
s
=
7
×
10
8
m
Average distance between the earth and the Sun
R
0
=
1.5
×
10
11
m
σ
=
5.67
×
10
−
8
W
m
−
2
K
−
4
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