Class 10ScienceMagnetic Effects of Electric CurrentMix Examples - Magnetic Effects of Electric Current
MediumWhat 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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$(a)$ Electric fuse is an important component of all domestic circuits. Why?
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$(b)$ An electric oven of rating $2 \, kW, 220 \, V$ is operated in a domestic circuit with a current rating of $5 \, A$. What result would you expect? Explain.
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View SolutionThe diagram below shows a circuit containing a coil wound over a long and thin hollow cardboard tube. Copy the diagram and:
$(i)$ Show the polarity acquired by each face of the solenoid.
$(ii)$ Draw the magnetic field lines of force inside the coil and also show their direction.
$(iii)$ Mention two methods to increase the strength of the magnetic field inside the coil.
$(i)$ Show the polarity acquired by each face of the solenoid.
$(ii)$ Draw the magnetic field lines of force inside the coil and also show their direction.
$(iii)$ Mention two methods to increase the strength of the magnetic field inside the coil.
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