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Questions
What do you understand by the term magnetic field lines?
What are magnetic field lines?
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Solution 1
A magnetic field line is a continuous curve in a magnetic field such that tangent at any point of it gives the direction of the magnetic field at that point.
Solution 2
Magnetic field lines are imaginary lines that indicate the direction and strength of the magnetic field around a magnet.
RELATED QUESTIONS
Fill in the following blank with suitable words:
The lines of ........... round a straight current-carrying conductor are in the shape of ...........
A current flows downwards in a wire that passes vertically through a table top. Will the magnetic field lines around it go clockwise or anticlockwise when viewed from above the table?
A thick wire is hanging form a wooden table. An anticlockwise magnetic field is to be produced around the wire by passing current through this wire by using a battery. Which terminal of the battery should be connected to the:
(a) top end of wire?
(b) bottom end of wire?
Give reason for your choice.
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]
In following figure, draw at least two magnetic field lines between the two magnets.
(a) 
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:
Define the Isogonic line.
Draw diagram showing the arrangement of the lines of force for two magnets in line, with unlike poles facing one another.
The magnetic field lines are stronger near the ______ and it diminishes as you go away from it.
Assertion (A): Magnetic field lines never intersect each other.
Reason (R): If they intersect, then at the point of intersection, the compass needle would point towards two directions, which is not possible.
