An iron rod becomes magnetic when
A) opposite ions accumulate at each end.
B) its atoms are aligned.
C) the net spins of many internal electrons are aligned.
D) its electrons stop moving and point in the same direction.
Correct Answer:
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Q1: Magnetism is due to the motion of
Q8: Magnet A has twice the magnetic field
Q9: Compared with the huge force that attracts
Q10: A strong magnetic field easily penetrates
A)human flesh.
B)plastic
Q10: Refrigerator magnets are typically
A)short range.
B)long range.
C)none of
Q12: A magnet will become weaker if it
Q14: Unlike electric charges,magnetic poles cannot be
A)located.
B)isolated.
C)destroyed.
Q17: The ultimate source of all magnetism is
A)tiny
Q18: Magnetic domains normally occur in
A)iron.
B)copper.
C)silver.
D)all of the
Q23: Wood does not have magnetic properties because
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