What happens to compass needles at the Earth's poles ?

What is a compass needle?

What will happen to a compass-needle when the compass is placed below a wire and a current is made to flow through the wire? Give a reason to justify your answer.

What direction compass needle points at poles ? Which needle to be used at poles ?

Write a note on : Compass needle.

In which directions a compass needle kept at a magnetic pole will point.

In which directions a compass needle kept at a magnetic pole will point.

Assertion: If a compass needle be kept at magnetic north pole of the earth, the compass needle may stay in way direction. Reason: Dip needle will stay vertical at the north pole of earth.

Assertion: If a compass needle be kept at magnetic north pole of the earth, the compass needle may stay in any direction. Reason: Dip needle will stay vertical at the north pole of earth.