Q1) write two uses of magnet Q2)state the directive property of a magnet. Q3) write two difference between permanent or temporary? Q4) what is magnetic induction ? what types of magnets can be made by this method - temporary or permanent ?
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Explanation:
Q1) Magnets are used to make a tight seal on the doors to refrigerators and freezers. They power speakers in stereos, earphones, and televisions. Magnets are used to store data in computers, and are important in scanning machines called MRIs (magnetic resonance imagers), which doctors use to look inside people's bodies.
Q2) The directive property of a magnet explains its tendency to align itself along an external magnetic field. When a magnet is suspended freely in air with the help of a thread then it tends to align itself in the geographic north-south direction. This property of magnet is known as directive property of target.
Q3) Permanent magnet
(a) Magnetic properties are permanent.
(b) Poles cannot be reversed.
(c) Strength of the magnetic field cannot be changed.
(d) It does not need an electric current to act as a magnet.
Temporary magnet(Electromagnet)
(a) Magnetic properties are temporary and stays as long as the current flows through it.
(b) Poles can be reversed by changing the direction of the current.
(c) Strength of the magnetic field can be changed by varying the current.
(d) It needs an electric current to work as a magnet.
Q4)Magnetic induction:- Magnetic induction is the production of an electromotive force across an electrical conductor in a changing magnetic field.
Magnetic induction is one of the ways of making magnetic material like steel and iron into magnets. In other words, magnetic induction is a process of inducing magnetism in an ordinary piece of magnetic material.
There are three types of magnets: permanent magnets, temporary magnets, and electromagnets.
Explanation:
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