1.

Earth's magnetic field always has a horizontal component except at :(a) magnetic pole (b) equator(c) at altitude of 60º (d) at altitude of 45º

Answer»

Correct option (a) magnetic pole   

Explanation:

At magentic pole, total intensity of earth's magnetic field is along the vertical.

∴ It has no horizontal component, Hence, the work done will be zero.



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