Question

A magnetic needle is placed on a cork floating in a still lake in the northern hemisphere. Does the needle together with the cork move towards the north of the lake?

Answer 1

Yes it will because earth is like one giant magnet and the magnetic compass points to the magnetic North Pole

Answer 2

The needle together with the cork would not transfer but would move towards the north of the lake and would revolve and position itself.

Explanation:

• A magnetic needle is characterized as a dipole that comes under the magnetic field of the earth.
• When a dipole is in the static field, it fails to encounter any net force.
• Thus, the needle together with the cork would move toward the north in the northern hemisphere but will not transfer and rotate on its own and place itself.

Learn more: Magnetic Needle

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