Question:
The magnetic lines of force inside a bar magnet
The magnetic lines of force inside a bar magnet
Updated On: Sep 12, 2022
- are from north-pole to south-pole of the magnet
- do not exist
- depend upon the area of cross-section of the bar magnet
- are from south-pole to north-pole of the magnet
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The Correct Option is D
Solution and Explanation
The magnetic lines of force inside a bar magnet are from the south pole to the north pole of the magnet.
Here are some important properties of magnetic field lines:
- Magnetic lines of force make closed loops.
- Field lines bulge out when going from an area of higher permeability to an area of lower permeability. The lines going from the surface of the magnet to the air density of the field line decrease.
- All magnetic field lines have the same strength and never cross each other.
- By convention, these field lines seem to originate from the north pole & end in the south pole of a bar magnet.
Read more about: Magnetic Field and Field Lines
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Concepts Used:
Types of Magnets
A magnet is a material or artificial setup that can produce a magnetic field around it.
Magnets are of generally three types which are as follows:
- Temporary magnets: Temporary magnets can be magnetized in the presence of a magnetic field. When the magnetic field is removed, these materials lose their magnetic property. Iron nails and paper-clips are examples of the temporary magnet.
- Permanent magnets: Permanent magnets are those magnets that are commonly used. They are known as permanent magnets because they do not lose their magnetic property once they are magnetized. Types of permanent magnets:
- Ceramic or ferrite
- Alnico
- Samarium Cobalt (SmCo)
- Neodymium Iron Boron (NIB)
- Electromagnets: Electromagnets consist of a coil of wire wrapped around the metal core made from iron. When this material is exposed to an electric current, the magnetic field is generated making the material behave like a magnet. The strength of the magnetic field can be controlled by controlling the electric current.