When a magnet is kept on a table and a compass is taken close to it, it points in a certain direction at every point near the magnet. When the points are joined, we obtain certain lines. Choose the correct statement(s) regarding the lines
1. The closer they are, the stronger the magnet.
2. They are imaginary lines which have a particular direction.

Only 1

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Only 2

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Both 1 and 2

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Neither 1 nor 2

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Solution

The correct option is C
Both 1 and 2

The lines obtained are magnetic field lines. They have a particular magnitude and direction at every point. Closer lines indicate a stronger magnetic field. However, these lines only come into existence when we join the points obtained by marking the direction which the compass points in. When the paper is taken away, there exist no lines. Hence, they are imaginary lines.

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Similar questions

Q. When a magnet is kept on a table and a compass is taken close to it, it points in a certain direction at every point near the magnet. When the points are joined, we obtain certain lines. Choose the correct statement(s):

Only 1
Both 1 and 2
Only 2
Neither 1 nor 2

Q. Question 1
Choose the incorrect statement from the following regarding magnetic lines of field.

(a) The direction of magnetic field at a point is taken to be the direction in which the north pole of a magnetic compass needle points
(b) Magnetic field lines are closed curves
(c) If magnetic field lines are parallel and equidistant, they represent zero field strength
(d) Relative strength of magnetic field is shown by the degree of closeness of the field lines

1. Magnetic field lines around a magnet cannot intersect.
2. When magnetic field lines intersect, the compass at the point of intersection can point in two different directions.
Choose the correct option.

Q. What are magnetic field lines? How is the direction of magnetic field at a point in a magnetic field determined using field lines?

Q. Two short bar magnets of length 1 cm each have magnetic moments

1.20 A m^{2}

and

1.00 A m^{2}

respectively. They are placed on a horizontal table parallel to each other with their

N

poles pointing towards the South. They have a common magnetic equator and are separated by a distance of

20.0 c m

. The value of the resultant horizontal magnetic induction at the mid-point

O

of the line joining their centres is close to
(Horizontal component of earth's magnetic induction is

3.6 \times 10^{- 5} W b / m^{2}

)

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