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प्रश्न
The alloys called ______ and ______ are used for making industrial magnets.
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उत्तर
The alloys called alnico and nipermag are used for making industrial magnets.
Explanation:
Alnico and Nipermag are special mixtures of metals used to make strong and long-lasting magnets for machines. They can hold their magnetism for a long time and are used in industries. Alnico is made from aluminium, nickel, cobalt, and iron, while Nipermag is made from nickel, iron, and titanium. These materials make the magnets stronger than ordinary iron.
संबंधित प्रश्न
You are given a magnet. How will you use it to find north-south direction at a place?
Define the following term regarding a bar magnet:
Magnetic axis
Define the following term regarding a bar magnet:
Magnetic equator
Fill in the blank.
The perpendicular bisector of the line joining the two poles of a magnet is called ...................
How will you do this?
Explain that a magnet has a certain magnetic field.
If a bar magnet is cut into equal pieces by cutting it at right angles to its axis at two places, ______ bar magnets are formed, and a total of _____ poles are formed.
Bar magnets are often stored in pairs as shown in the figure. E and F being pieces of metal.
Why are E and F placed in contact with the poles of the magnets as shown in the diagram?
Bar magnets are often stored in pairs as shown in the figure. E and F being pieces of metal.
What is the material of darkened part?
The figure shows a freely suspended magnet in the rest position. Copy the diagram and on its show:
- Angle of declination
- Angle in dip
Match the following.
| Magnetite | Magnetic lines |
| A tiny pivoted magnet | Natural magnet |
| Cobalt | Compass box |
| Closed curves | Ferromagnetic material |
| Bismuth | Diamagnetic material |
