UPSC Civil Services 2012 Prelims General Studies Paper I

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Question : 20 of 100

Marks: +1, -0

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?

The Earth’s magnetic field diverts them towards its poles
Ozone layer around the Earth reflects them back to outer space
Moisture in the upper layers of atmosphere prevents them from reaching the surface of the Earth
None of the statements (a), (b) and (c) given above is correct

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