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प्रश्न
You are provided with two identical metal bars. One out of the two is a magnet. Suggest two ways to identify the magnet.
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उत्तर
There are two techniques to recognise magnets.
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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.
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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.
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संबंधित प्रश्न
Describe a simple experiment to illustrate that like poles of two magnets repel each other while the unlike poles attract ?
Write true or false of the following statement.
Magnetic keeper is a wooden piece.
Write true or false of the following statement.
Copper cannot be magnetised.
How will you do this?
Explain that a magnet has a certain magnetic field.
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.
What is a natural magnet?
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.
A magnet attracts ______.
Why it is not advisable to slide a magnet on an iron bar back and forth during magnetising it?
