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प्रश्न
How will you do this?
Explain that a magnet has a certain magnetic field.
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उत्तर
A magnet has a certain magnetic field, which can be demonstrated using the below activity.
Take some drawing cardboard and sprinkle some iron filings on it. Notice the position of the iron filings as a whole. Now, take a bar magnet and slowly bring it below the cardboard. You will observe that the iron filings tend to attract towards the magnet and align themselves as shown.
It represents that the magnet exerts a force around its body with a stronger force near the two poles. Also, this regular pattern of the iron filings on the board represents the lines of magnetic field. Thus, a magnet has a certain magnetic field, which can be represented by curved lines around the magnet.
संबंधित प्रश्न
Write true or false of the following statement.
Magnetic poles occur in pairs.
State three important uses of a magnet.
Define the following term regarding a bar magnet:
Magnetic field
Answer the following in detail.
How is the single-touch method of magnetism different from the double-touch method?
With whom should I pair up?
| Group 'A' | Group 'B' |
| (a) Compass | 1. The highest magnetic force |
| (b) The door of a cupboard | 2. Like poles |
| (c) Repulsion | 3. A magnet |
| (d) Magnetic pole | 4. A magnetic needle |
Explain the mechanism by which unmagnetized iron nails get attracted to a magnet when brought near it.
Define the term Effective length of a magnet
Define the following term:
Angle of declination
What is meant by electrostatic induction? You have been given two metal containers A and Band a positively charged body X. With the help of a diagram, explain the different stages of charging - A positively, and B negatively.
With the help of a diagram explain the following:
Magnetisation of steel needle using electric current such that the pointed end should have north polarity.
