What are permanent magnets and electromagnets? Give two uses of each.
(N/A) permanent magnet is a material that retains its magnetic properties for a long time without the need for an external power source. Its magnetic field is constant.
An electromagnet is a temporary magnet formed by passing an electric current through a coil (solenoid) wound around a soft iron core. Its magnetism exists only as long as the current flows.
Uses of Permanent Magnets:
$1$. Electric generators
$2$. Loudspeakers
Uses of Electromagnets:
$1$. Electric cranes for lifting heavy iron objects
$2$. Electric bells
An electromagnet is a temporary magnet formed by passing an electric current through a coil (solenoid) wound around a soft iron core. Its magnetism exists only as long as the current flows.
Uses of Permanent Magnets:
$1$. Electric generators
$2$. Loudspeakers
Uses of Electromagnets:
$1$. Electric cranes for lifting heavy iron objects
$2$. Electric bells
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