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प्रश्न
Repulsion is a surer test of magnetic condition of a body than attraction. Explain.
उत्तर
Repulsion is the surest test of magnetism because the attraction can be caused between two unlike poles of the two magnets or between the magnet and magnetic substance such as iron, nickel etc. But repulsion is caused when two similar poles approach each other.
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संबंधित प्रश्न
Draw a diagram to show the magnetic field lines around a bar magnet.
What is a magnetic field? How can the direction of magnetic field lines at a place be determined?
How will you test whether a given rod is made of iron or copper?
[Hint : Iron rod gets magnetised when placed near a bar magnet by magnetic induction, while copper rod does not get magnetised]
Sketch four magnetic field lines as obtained in a limited space on a horizontal plane in the earth's magnetic field alone.
Figure. shows a bar magnet placed on the table top with its north pole pointing towards south. The arrow shows the north-south direction. There are no other magnets or magnetic materials nearby.
Insert two magnetic field lines on either side of the magnet using arrow head to show the direction of each field line.
How do you account for the following fact?
Soft iron keepers help to prevent the magnets from losing their magnetic properties.
Draw diagram showing the arrangement of the lines of force for a piece of soft iron laid in line with the magnetic field.
State any two properties of a magnet.
Inside the magnet, the field lines moves ____________.
