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प्रश्न
A magnet has _______ magnetic poles.
रिक्त स्थान भरें
उत्तर
A magnet has two magnetic poles.
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Classification of Magnets
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संबंधित प्रश्न
man-made magnets are called ______ magnets.
Match the following:
| 1. | Natural magnets | a. | Levitating propeller |
| 2. | Artificial magnets | b. | Wooden spoon |
| 3. | Magnetic substance | c. | Heating |
| 4. | Nonmagnetic substance | d. | Bar magnet |
| 5. | Demagnetization | e. | Pin holders |
| 6. | Electromagnetic train | f. | Magnetite |
Analogy:
Natural magnet: Magnetic stones.
Artificial magnet: ______.
How will you make levitating propeller?
______ is the ore with attracting property.
What are the different types of artificial magnets?
Who laid the foundation for magnetism and suggested that the Earth has a giant bar magnet?
Mention the three types of iron ores.
A bar magnet is cut into two pieces A and B, from the middle, as shown in Fig. 13.8.
Will the two pieces act as individual magnets? Mark the poles of these two pieces. Suggest an activity to verify your answer.
Permanent magnets are made of hard magnetic materials like alnico.
