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प्रश्न
Explain the following :
Several soft iron pins can cling, one below the other, from the pole of a magnet.
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उत्तर
Several soft iron pins can cling one below the other from the pole of a magnet because the magnet induces magnetism in an iron nail which gets attracted by the magnet and clings to it. This magnetized nail magnetizes the other nail near it by magnetic induction and attracts it. This process continues until force of attraction on first nail is sufficient to balance the total weight of all nails in chain.
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संबंधित प्रश्न
The magnetic field lines:
(a) intersect at right angles to one another
(b) interest at an angle 45° to each another
(c) do not cross one another
(d) cross at an angle of 60° to one anotherv
In the straight wire A, current is flowing in the vertically downwards direction whereas in wire B the current is flowing in the vertically upward direction. What is the direction of magnetic field:
(a) in wire A?
(b) in wire B?
Name the rule which you have used to get the answer.
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]
How do you account for the following fact?
Soft iron keepers help to prevent the magnets from losing their magnetic properties.
State any two properties of a magnet.
The relative strength of the magnetic field at a point in the space surrounding the magnet is shown by the ____________.
Magnetic field lines determine ______.
Magnetic lines of force never ______ each other.
The direction of the magnetic lines around a current-carrying conductor can be easily understood using the ______ rule.
