Question

1. Which among the following produces strong magnetic field?
a) Permanent magnet
b)
Natural magnet
c) Bar magnet
d) Electromagnet​

Answer 1

Magnetic field of Natural magnets

Explanation:

• Natural magnets differ from other magnets in that they do not require any modifications to their properties in order to become magnetised.
• When rubbed by magnets or exposed to electric fields, some materials can become magnetised briefly or permanently.
• Natural magnets exist in the Earth and are already magnetic. The mineral magnetite, which is made up of iron oxide, is an example of a natural magnet.
• A lodestone is a form of magnetite that was discovered as one of the first natural magnets. Although the magnetic field of basalt is small, it contains magnetite, which occurs when lava hardens.
• Pyrhotite, which is made up of iron sulphide, is another natural magnet. It is only weakly magnetic, and the intensity of its field varies depending on how much iron is present.
• The Earth itself behaves as a natural magnet. It has a magnetic south pole that is located in Canada, which is physically north. Similarly, its magnetic north pole is located in the Antarctic, which is geographically south.
• Moving charges, or electric current, produce magnetism. Magnetic fields are created and responded to by moving charges.
• Electrons in an atom revolve around the nucleus and rotate on their axes in a process known as spin. Magnetic fields are created as a result of these movements.

Answer 2

Answer:

natural magnet is fixed in earth's poles so they compass needle deflect and show direction

North pole natural magnet deflects N pole of compass ie, natural magnet is opposite to artifical magnet.