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Grade: 12
        
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? If yes (or no), then why?
 
3 months ago

Answers : (2)

Arun
22331 Points
							
Yes, it will because earth is like one giant magnet and the magnetic compass points to the magnetic North Pole.
3 months ago
Khimraj
3008 Points
							
Key Idea: Magnetic needle behaves as a dipole. Magnetic needle is a dipole which is in earth's uniform magnetic field and as a dipole in a uniform field does not experience any net force but may experience a couple as shown  in figure, so the needle together with the cork will not translate ie, move towards the north of the lake, but will rotate and set itself parallel to the field with its north pole pointing north. 
3 months ago
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