Advertisements
Advertisements
प्रश्न
You are provided with two identical metal bars. One out of the two is a magnet. Suggest two ways to identify the magnet.
Advertisements
उत्तर
There are two techniques to recognise magnets.
-
Take both metal bars and place them in the iron filings, then remove them immediately. The magnet will be filled with iron filings, while the regular metal bar will have no filings.
-
Place a magnet near each of the metal bars one at a time. The magnetic bar that attracts or repels the magnet is magnetic, whilst the other is not.
APPEARS IN
संबंधित प्रश्न
How will you test whether a given rod is made of iron or not?
State three important uses of a magnet.
There are two knitting needles. One of them is magnetized. How will you find out which one is magnetized, if no other magnet is available?
Define the following term:
Angle of declination
Explain the following:
Resistance of a conductor
Magnets are used in _______ for generating electricity.
How can you identify non-magnetic materials? Give an example of a nonmagnetic material.
Match the following:
| 1. | Electricity and magnetism | a. | Step-down transformer |
| 2. | Force on the conductor | b. | Hans Christian Oersted |
| 3. | Electric bell | c. | I LB |
| 4. | Ns <Np | d. | Electromagnet |
