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प्रश्न
With the help of a diagram explain the following:
Magnetisation of an iron bar by a single touch method.
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उत्तर
The magnetization of Iron Bar by Single Touch Method: Place the iron piece on the table and stroke it with a bar magnet from A to B with one end of the magnet. When the magnet reaches B it is lifted and brought back to A to repeat the stroke. After a few strokes, we will notice that A has acquired the same polarity as the pole rubbed against it.
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संबंधित प्रश्न
State four important properties of a bar magnet?
Answer the following.
Can you bring two similar poles of two different magnetic close together easily? Why?
How will you do this?
Explain that a magnet has a certain magnetic field.
The figure shows a freely suspended magnet in the rest position. Copy the diagram and on its show:
- Angle of declination
- Angle in dip
State three important properties of a magnet.
Give scientific reason:
Soft iron is used to make electromagnets.
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.
Consider the statement given below and choose the correct option.
Assertion: Iron filings are concentrated more at the magnetic poles.
Reason: The magnets are so sharp.
Why it is not advisable to slide a magnet on an iron bar back and forth during magnetising it?
