A small paramagnetic sphere is placed near the north pole of a strong bar magnet

Question

A small paramagnetic sphere is placed near the north pole of a strong bar magnet. Which one of the following statements concerning the subsequent behavior of the ball when it is released is the most likely?
a) The ball will remain stationary.
b) The ball will roll toward the north pole of the bar magnet and stick to it.
c) The ball will roll toward the south pole of the bar magnet and stick to it.
d) The ball will roll away from the north pole.

In which of the following locations would you expect the Earth’s magnetic field inclination to have it largest value?
a) Dallas, Texas
b) Atlanta, Georgia
c) Washington, DC
d) Chicago, Illinois
e) Seattle, Washington

Which one of the Maxwell’s laws leads to the conclusion that there are no magnetic field loops that are not closed?
a) Gauss’ law for electricity
b) Gauss’ law for magnetism
c) Faraday’s law
d) Ampere-Maxwell law
e) Coulomb’s law

Explanation / Answer

A small paramagnetic sphere is placed near the north pole of a strong bar magnet. Which one of the following statements concerning the subsequent behavior of the ball when it is released is the most likely? The ball will roll away from the north pole.

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