Magnet
Use of Magnets
Magnets are used
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in refrigerators.
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in radio and stereo speakers.
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in audio and video cassette players.
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in children’s toys and;
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on hard discs and floppies of computers.
Properties of Magnet
- A free suspended magnet always points towards the north and south direction.
- The pole of a magnet which points toward north direction is called north pole or north-seeking.
- The pole of a magnet which points toward south direction is called south pole or south seeking.
- Like poles of magnets repel each other while unlike poles of magnets attract each other.
Magnetic field and field lines
The influence of force surrounding a magnet is called magnetic field. In the magnetic field, the force exerted by a magnet can be detected using a compass or any other magnet. The magnetic field is represented by magnetic field lines.
The topics discussed in this chapter are as follows:
- Field and field lines
- Magnetic field due to a current carrying conductor
- Magnetic field due to a straight current carrying conductor
- Right hand thumb rule
- Magnetic field due to current through a circular loop
- Magnetic field due to current in a solenoid
- Force on a Current Carrying Conductor in a Magnetic Field
- Fleming's left hand rule
- Electromagnetic Induction and Electric Generators
- Domestic electric circuits