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प्रश्न
Explain the mechanism of attraction of iron nails by a magnet when brought near them.
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उत्तर
When iron nails are brought near one end of a magnet, the nearer end of piece acquires an opposite polarity by magnetic induction. Since unlike poles attract each other, therefore, iron nails are attracted towards the end of the magnet. Thus, the iron nail first becomes a magnet by induction and then it is attracted.
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संबंधित प्रश्न
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
A charged particle enters at right angles into a uniform magnetic field as shown:
What should be the nature of charge on the particle if it begins to move in a direction pointing vertically our of the page due to its interaction with the magnetic field?
Can two magnetic field lines intersect each other? Give reason to your answer.
In following figure, draw at least two magnetic field lines between the two magnets.
(b) 
Write a note on the 'magnetic field'.
State whether true or false. If false, correct the statement.
Magnetic field lines always repel each other and do not intersect.
The magnetic field lines always begin from ____________.
The magnetic field is the strongest at ____________.
