Answer:
The
differences between a permanent magnet and an electromagnet are
(1x3)
S. No.
Permanent magnet
Electromagnet
(i)
Its magnetic field is weak.
Its magnetic field is strong and variable.
(ii)
Magnetic properties are ever existing.
Magnetic properties are retained only till electric
current is passing.
(iii)
N-S polarity is fixed.
N-S polarity can be reversed by reversing the direction
of electric current.
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