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Question

The magnetic compass is not useful for navigation near the magnetic poles because -

A
The magnetic field near the poles is zero.
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B
The magnetic field near the poles is almost vertical.
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C
At low temperature, the compass needle looses its magnetic properties.
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D
None of these
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Solution

The correct option is B The magnetic field near the poles is almost vertical.
The magnetic compass is not useful for navigation near the magnetic poles because the magnetic field near the poles is almost vertical.

Hence, option (B) is the correct answer.

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