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Question

Why should we pivot the compass needle on a sharp pin?


A

To minimise the magnetic effect on the pin

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B

To maximise the magnetic effect on the pin

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C

To minimise the friction between the pin and the compass needle

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D

To ensure that the compass needle will not drop from the pivoted point.

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Solution

The correct option is C

To minimise the friction between the pin and the compass needle


By pivoting the compass needle on a fixed pin, the friction between the needle and the fixed pin is minimized and the compass needle can rotate freely in the magnetic field.


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