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प्रश्न
What is a lodestone?
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उत्तर
Lodestone is an ore of iron oxide (Fe3O4). This ore attracts small pieces of iron and it sets itself along a definite direction when it is suspended freely. It is a natural magnet which was used for the navigation by the mariners.
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संबंधित प्रश्न
Explain why, two magnetic field lines of not intersect each other.
A strong bar magnet is placed vertically above a horizontal wooden board. The magnetic lines of force will be:
(a) only in horizontal plane around the magnet
(b) only in vertical plane around the magnet
(c) in horizontal as well as in vertical planes around the magnet
(d) in all the planes around the magnet
Draw magnetic field lines produced around a current-carrying straight conductor passing through cardboard. Name, state and apply the rule to mark the direction of these field lines.
Answer the following question.
Draw the pattern of magnetic field lines of
(i) a current-carrying solenoid and
(ii) a bar magnet.
List two distinguishing features between the two fields.
Which substances are used for making electromagnets?
Write a note on the 'magnetic field'.
Draw diagram showing the arrangement of the lines of force for a single magnet.
State whether true or false. If false, correct the statement.
Magnetic field lines always repel each other and do not intersect.
The magnetic field is the strongest at ____________.
