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प्रश्न
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 |
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उत्तर
| Column A | Column B |
| (a). Human body | (3). conductor |
| (b). Silk thread | (5). insulator |
| (c). Charge in motion | (2). current |
| (d). soft iron | (4). electromagnet |
| (e) . Electromagnet | (1). electric bell |
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संबंधित प्रश्न
You are given a magnet. How will you use it to find north-south direction at a place?
What is declination ? Draw a diagram to show the angle between the declination and true direction of geographic north.
Answer the following in short.
If a bar magnet is placed over iron filings, where will the attraction of the iron fillings be
- maximum?
- minimum?
If a magnet attracts a piece of metal, that piece must be made of ______.
Fill the blank spaces in the table given below:
| Nature of bar | Action of compass needle | |
| North Pole | South Pole | |
| Non-magnetic | No action | ________ |
| ________ | attracted | attracted |
| North pole of a bar magnet | ________ | _________ |
| ________ | attracted | repelled |
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?
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?
Define the term Magnetic axis
Define the following term:
Angle of declination
How can you identify non-magnetic materials? Give an example of a nonmagnetic material.
