A magnet produces a magnetic field in the space around it, which ex-
erts a force on any other magnet placed in it. Field lines are used to
represent a magnetic field. A field line is the path along which a hypo-
thetical free north pole would tend to move. The direction of the mag-
netic field at a point is given by the direction that a north pole placed at
that point would take. Field lines are shown closer where the magnetic
field is greater.
a) What is a magnetic field line ?
b) Can two magnetic field lines intersect? Justify.
c)
Give two properties of magnetic field lines.
Answers
Answer:
A - Magnetic field lines are defined to have the direction that a small compass points when placed at a location. (a) If small compasses are used to map the magnetic field around a bar magnet, they will point in the directions shown: away from the north pole of the magnet, toward the south pole of the magnet.
B-Two magnetic field lines can never intersect each other, because if tangent drawn to the field lines then it will have two direction of magnetic field at the same point of intersection which is not possible, since magnetic field line have only one direction at a particular point.
Magnetic field lines are continuous curves, which are originate from North pole and terminate on south pole. Inside the magnet it moves from south pole to north pole forming a closed loop. so, there is no any origination or termination point like electric field.
C - Magnetic fields can be pictorially represented by magnetic field lines, the properties of which are as follows:
The field is tangent to the magnetic field line.
Field strength is proportional to the line density.
Field lines cannot cross.
Field lines are continuous loops.
Step-by-step explanation:
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