Question

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 ?​

Answer 1

1. 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.
2. 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.
3. A permanent magnet is one that retains its magnetic properties for a long period of time. Examples are iron, nickel, cobalt and some rare earth alloys etc. Temporary magnets are those that simply act like permanent magnets when they are within a strong magnetic field.
4. 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.