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At which place Earth's magnetic field be...

At which place Earth's magnetic field becomes horizontal?

A

plane through magnetic meridian

B

plane through magnetic equator

C

plane through magnetic poles

D

it is not horizontal anywhere

Text Solution

Verified by Experts

The correct Answer is:
B
The horizontal component of the earth's magnetic field is `B_(H)=B cos delta`, where `delta` is the angle of the dip.
at the equator, `delta =0" ":. B_(H)=B cos delta =B`
Thus in the equatorial plane, the earth's magnetic field is horizontal.
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