Question

at which place the compass needle fails as a direction finder ?
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Answer 1

Answer:

north

A compass needle points north because the north pole of the magnet inside it is attracted to the south pole of Earth's built-in magnet.

Answer 2

Answer:

At the geomagnetic north or south pole , the compass needle fails as a direction finder.

Explanation:

• At the geomagnetic north or south pole, earth's magnetic field's horizontal component  is zero.
• As a result, at the pole of the earth the compass needle will not necessarily rest along N-S direction, rather it may rest in any arbitrary direction in the horizontal plane.