Q180 / 180 · KCET 2022 · Physics

Which of the following statements proves that Earth has a magnetic field ?

  • A
    Earth is a planet rotating about the NorthSouth axis.
  • B
    Earth is surrounded by ionosphere.
  • C
    A large quantity of iron-ore is found in the Earth.
  • Correct answer
    D
    The intensity of cosmic rays stream of charged particles is more at the poles than at the equator.

Solution

The intensity of cosmic rays stream of charged particles is move at the poles than at the equator because the Earth's magnetism is strongest at poles. Therefore, cosmic rays are deflected away from the equator. In order to reach at equator, they need to pass greater kinetic energy which shows that the Earth has a magnetic field.

Hence, the correct answer is option: 'D'.

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