b) Magnets can obviously exert forces on other magnets. List three other objects on which magnets can exert a force.
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How are the elementary magnets aligned in the magnet in (Figure 1)?
A. Most of the elementary magnets are oriented parallel to the flat face, in the direction of the paper clips, with one type of pole oriented upward and the other type of pole downward.
B. Most of the elementary magnets is oriented with one type of pole toward the flat face on the left and the other pole toward the flat face on the right.
C. Most of the elementary magnets is oriented parallel to the flat face, in the director perpendicular to the paper clips, with one type of pole oriented out of the figure and the other type of pole into the figure.
Which statement is true of magnets?
a) Earth is an electromagnet
b) Electromagnets are weaker than permanant magnets
c) A magnet always has a north pole, and may or may not also has a south pole
d) A permanent magnet can be turned off.
Which of the following best describes magnetic field lines?
A. They always begin at the north pole and terminate at the south pole.
B. They can only cross when multiple magnets are present.
C. They show the direction in which a positive charge will experience a force.
D. More than one of the other options are correct.
E. They show the relative strength and direction of the magnetic field.