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What is the source of electric energy in an artificial satellite?
1. A dynamo
2. A thermopile
3.  Solar cells
4. A mini nuclear reactor

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Correct Answer - Option 3 :  Solar cells

The correct answer is Solar cells.

  • The main source of electric energy in an artificial satellite are solar cells.
  • Solar cells or photovoltaic cells are made of Silicon.
  • They convert light energy into electrical energy through the photovoltaic effect.
    • The effect due to which light energy is converted to electric energy in certain semiconductor materials is known as the photovoltaic effect.
  • A solar cell is basically a p-n junction diode.
    • p-n junction in an electrical circuit allows current to flow more easily in one direction than another.
    • p means positive side and n means negative side.

  • Solar panels are mounted on satellites because solar energy is readily available in space.
    • Solar cells absorb sunlight and then convert that light energy into an electrical current.
    • The Sun is a very powerful, clean and convenient source of power.


  • A dynamo is an electrical generator that creates direct current using a commutator.
  • A thermopile generator generates electrical energy from heat.
  • Nuclear energy originates from the splitting of atoms (generally Uranium) which is called fission.

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