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प्रश्न
Select the correct option:
A bar magnet is rubbed on a bar of steel along its length 20 times. The bar of steel gets magnetised due to the process of:
पर्याय
induction
conduction
friction
none of the these
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उत्तर
conduction
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संबंधित प्रश्न
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.
A magnetic field exerts no force on:
an electrical charge moving perpendicular to its direction
an unmagnetised iron bar
a stationary electric charge
a magnet
If you hold a coil of wire next to a magnet, no current will flow in the coil. What else is needed to induce a current?
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]
Explain what you understand by magnetic induction. What role does it play in attraction of a piece of iron by a magnet?
Draw the pattern of magnetic field lines near a bar magnet placed with its North Pole pointing towards the geographic North. Indicate the position of neutral points by marking X.
State whether the magnetic field lines in part (a) represent a uniform magnetic field or non-uniform magnetic field?
The magnetic field is the strongest at ____________.
State the inference drawn about the direction of the magnetic field lines on the basis of the following diagrams.
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| Figure 'a' | Figure 'b' |
