Which of the following is/are true regarding a magnet?

Magnets will always have two poles, a magnetic north and a magnetic south

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Ferromagnetic materials like iron can be magnetized with a strong permanent magnet

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Invisible magnetic field lines of earth run from the south to north poles

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All of the above

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Solution

The correct options are
A Magnets will always have two poles, a magnetic north and a magnetic south
B Ferromagnetic materials like iron can be magnetized with a strong permanent magnet
We know that magnetic monoploes do not exist and magnets have two poles- magnetic north pole and magnetic south pole.
Also, it is also true that iron is ferromagetic material which can be magnetized with a strong permanent magnet.
Invisible magnetic field lines of earth run from north to south poles.
So, statements A and B are true but statement C is false.

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Similar questions

Q. Assertion :Magnetic field strength at a point on axial line of a bar magnet is along south to north pole of magnet. Reason: The magnetic field strength can never be along north to south pole of a magnet.

Q. A bar magnet is placed north-south with its north pole due north. The points of zero magnetic field will be in which direction from centre of magnet

Q. Fill in the blanks with the appropriate word.
(a) If a bar magnet is hung by a thread tied at its centre, its north pole becomes steady in the direction of the ................ Pole of the earth.
(South, north, east, west)
(b) If a bar magnet is cut into equal pieces by cutting it at right angles to its axis at two places, ........... bar magnets are formed, and a total of ................ poles are formed.
(6,3,2)
(c) There is repulsion between the .......... poles of a magnet, and attraction between its ............ poles.
(opposite, like.)
(d) When magnetic material is taken close to a magnet, the material acquires ............... .
(permanent magnetism, induced magnetism)
(e) If a magnet attracts a piece of metal, that piece must be made of ............. .
(any other metal but iron, magnetic material or iron, non-magnetic material)
(f) A magnet remains steady in a .............. direction.
(east-west, north-south)

Q. (a) Define magnetic field lines. Describe an activity to draw a magnetic field line outside a bar magnet from one pole to another pole.
(b) Explain why, a freely suspended magnet always points in the north-south direction.

Why do we always take the north pole of the compass as a reference point while plotting the magnetic field of a magnet?? Taking the south pole as a reference point we can even plot the field outside a bar magnet from south to north..

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