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CBSE Class 12-science Answered

Earth behaves as a magnet with magnetic poles approximately near the geographic poles. (a) The order of magnitude of earth's magnetic field in tesla is ____. (b) What do you understand by 'dynamo effect'? (c) Classify the following materials into diamagnetic and paramagnetic. (i) Lead (ii) Magnesium (iii) Tungsten (iv) Copper.
Asked by Topperlearning User | 01 Jun, 2015, 02:14: PM
answered-by-expert Expert Answer

(a) 3.6 x 10-5 T

 

(b) The earth's magnetic field is thought to arise due to electrical currents produced by convective motion of metallic fluids in the outer core of the earth. This is called dynamo effect.

 

(c) Lead - diamagnetic

Magnesium - paramagnetic

Tungsten - paramagnetic

Copper - diamagnetic

Answered by | 01 Jun, 2015, 04:14: PM

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