125. Electrically charged particles from space travelling at speeds of several hundred km/sec can severely harm living beings if they reach the surface of the Earth. What prevents them from reaching the surface of the Earth? (2012)

(a) The Earth’s magnetic field diverts them towards its poles 

(b) Ozone layer around the Earth reflects them back to outer space 

(c) Moisture in the upper layers of atmosphere prevents them from reaching the surface of the Earth 

(d) None of the statements (a), (b) and (c) given above is correct 

 

Answer: (a) 

Option (a) is correct: The Earth itself is a magnet, with a magnetic north pole and south pole. The origin of the Earth’s magnetic field is said to be a result of the dynamo effect. Electric currents produced by the rotation of iron-nickel cores. The Earth’s magnetic field continually traps moving charged particles coming from the sun, called the solar wind. It Protects us from solar winds containing electrically charged Particles.

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