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प्रश्न
What is a lodestone?
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, a freely suspended magnet always points in the north-south direction.
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
An electron beam enters a magnetic field at right angles to it as shown in the Figure.
The direction of force acting on the electron beam will be:
to the left
to the right
into the page
out of the page
In a uniform magnetic field, the field lines are:
State briefly the molecular theory of magnetism.
Draw diagram showing the arrangement of the lines of force for a piece of soft iron laid in line with the magnetic field.
Distinguish between
Magnetic properties of iron and steel.
The relation between weber and Tesla is ______.
Can two magnetic lines of force intersect? Justify your answer:
"Magnetic field is a physical quantity that has both direction and magnitude." How can this statement be proved with the help of magnetic field lines of a bar magnet?
