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Question

A compass has a small balanced pointer that always points North-South. This is because:



A

The stars exert a force on the needle

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B

The earth has a magnetic field and the pointer is magnetic 

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C

Gravity makes the needle point this way

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D

The compass needle points to cold places  

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Solution

The correct option is D

The earth has a magnetic field and the pointer is magnetic 


The magnetic compass is the oldest instrument for navigation and has been a vital tool for navigators at sea for centuries. The Earth has a substantial magnetic field. The poles of the earth act as magnetic poles, as such a bar magnet, when suspended freely gets attracted towards the poles of Earth. So, it aligns itself in a North-South direction.


Physics

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