Advertisements
Advertisements
Question
Answer the following in detail.
How can a magnet be demagnetized?
Solution
A magnet can be demagnetized in the following ways :
- rough handling
- hammering the magnet several times.
- passing an alternating current around the magnet.
- dropping the magnet on the floor several times.
- heating the magnet to a very high temperature.
APPEARS IN
RELATED QUESTIONS
Match the following
| Column A | Column B |
| (a). Human body | (1). electric bell |
| (b). Silk thread | (2). current |
| (c). Charge in motion | (3). conductor |
| (d). soft iron | (4). electromagnet |
| (e) . Electromagnet | (5). insulator |
State three important uses of a magnet.
Define the following term regarding a bar magnet:
Magnetic axis
How will you do this?
Determine whether a material is magnetic or non-magnetic.
If a magnet is carefully broken into two pieces as shown in figure (i), how does the magnetic strength of each piece compare with that of the original magnet? If another magnet is carefully broken in half along its long axis shown in figure (ii), how would the strength of each piece compare with that of the original magnet?
Define the term Magnetic axis
Define the following term:
Angle of declination
An object that is attracted by magnet.
What will happen when we place magnets near cell phones, computers, and DVDs?
