Class 10 Sources Of Energy CBSE Questions & Answers

Class 10 · Sources Of Energy

Class 10 Sources of Energy CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Find the incorrect statement about solar cooker
  • A
    It take short time for cooking.
  • B
    the nutrients of food do not get destroyed
  • C
    It saves fuel
  • D
    the direction of reflector of solar cooker has to be adjusted frequency
    Correct
2
If the energy associated with 1amu is 931Mev than the energy associated with {/tex}{3 \over 2}{tex} amu is
  • A
    1396.5Mev
    Correct
  • B
    1783.9Mev
  • C
    1295.8Mev
  • D
    1464.3Mev
3
Which of the following is not present in Hydrogen Bomb.
  • A
    Tritium
  • B
    14C
    Correct
  • C
    Deuterium
  • D
    \({\rm{L}}{{\rm{i}}^{\rm{6}}}\)
4
Why do we use black surfaces in solar devices?
  • A
    because black surfaces absorb more heat than unblackened surface.
    Correct
  • B
    because temperature in the water of blackened surface was found to rise slowly and hence cooks food easily
  • C
    because water in contact with black surface acquires less heat
  • D
    because the blackened surface gives less warmth than white
5
Lights from two different sources A and B have wavelength 0.3 micron and 0.7 micron respectively. Which one of the two light carry more energy per photon?
  • A
    Both the lights have same energy
  • B
    light sources A
    Correct
  • C
    Light source B
  • D
    None of these
6
Statement A : obtaining energy from nuclear fusion reaction is preferable to obtaining of energy from nuclear fission reactions. , Statement B : Electricity generated by the water stored in a dam can be considered to be another form of solar energy.
  • A
    Statement A is true, Statement B is false
  • B
    Statement B is true, Statement A is false
    Correct
  • C
    Both the Statement A and B are false
  • D
    Both the statement A and B are false
7
How much energy is released by completely converting 1.5 mg of matter into energy
  • A
    \({\rm{4}}.{\rm{5 x 1}}{0^{{\rm{13}}}}\)Joule
  • B
    \({\rm{6 x 1}}{0^{{\rm{13}}}}\)Joule
  • C
    \({\rm{13}}.{\rm{5 x 1}}{0^{\rm{6}}}\) Joule
    Correct
  • D
    \({\rm{9 x 1}}{0^{{\rm{16}}}}\)Joule
8
Which energy is not derived from the sun?
  • A
    wind energy
  • B
    Nuclear energy
    Correct
  • C
    Biomass energy
  • D
    Ocean wave energy
9
A solar panel is made by combining a large member of-
  • A
    Solar water heaters
  • B
    Solar concentrators
  • C
    Solar cells
    Correct
  • D
    Solar cookers
10
The site of hydroelectric plant should be chosen carefully because it-
  • A
    Produces a large amount of electricity
  • B
    Is expensive.
  • C
    Produces a large amount of CO and \({\rm{C}}{{\rm{O}}_{\rm{2}}}\)
  • D
    Affects the organisms of the region
    Correct
11
The conditions for producing biogas is
  • A
    Neither air nor water
  • B
    Water but not air
    Correct
  • C
    Air and water
  • D
    Air but not water
12
In addition to visible light, which other type of radiations are emitted by a 100w electric Lamp when it is glowing?
  • A
    X – rays.
  • B
    gamma radiation
  • C
    Infrared radiation
    Correct
  • D
    ultraviolet radiation
13
Geothermal energy is feasible in regions that-
  • A
    Have thermal
  • B
    Are over hot spots in the crust.
    Correct
  • C
    Have coal mines
  • D
    Are near the sea
14
The mass number of elements P, Q, R are 2, 180, 235 respectively which one of them is most suitable to make a hydrogen bomb?
  • A
    P and Q both
  • B
    Q only
  • C
    P only
    Correct
  • D
    Q and R both
15
Name the compound that is added to LPG to detect leakage
  • A
    None of these
  • B
    Methyl Isocynide
  • C
    Ethyl mercaptan
    Correct
  • D
    sodium thiosulphate