If diamagnetic substance is brought near north or south pole of a bar magnet, it is:
Correct answer: D. Repelled by the poles
- A. Attracted by poles
- B. Attracted by North pole & repelled by south pole
- C. Attracted by south pole & repelled by North pole
- D. Repelled by the poles
Explanation
Diamagnetic substances are those that do not have unpaired electrons in their atoms. When a diamagnetic substance is brought near a magnet, it becomes temporarily magnetized in the opposite direction to the magnet. This causes the diamagnetic substance to experience a weak repulsion from both the north and south poles of the magnet.
This question appeared on the ETEA MDCAT 2009 paper, which you can sit online with every answer explained.
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About Magnetic Flux Density
Magnetic flux density measures the magnetic force acting on a current carrying conductor or moving charge in a magnetic field. Work includes the relations B equals F divided by IL and F equals qvB, the tesla as its SI unit, field direction and the distinction between flux density and magnetic flux.
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