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Which one of the following statement is ...

Which one of the following statement is incorrect?

A

a magnet does not exert a force on a stationary electrically charged body

B

magnetic field lines are closed continuous carves and extend from south pole to north pole within the magnet

C

the tangent to the magnetic field line at any point gives the direction of the magnetic field at that point

D

magnetic field lines are widely separated for the magnetic field is strong

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