Describe the steps involved in magnetising an iron strip with the help of a magnet. - Science

Describe the steps involved in magnetising an iron strip with the help of a magnet.

Answer in Brief

The following steps may be used to magnetise an iron strip using a magnet:

Lay down the required iron strip to be magnetised on a solid wood surface.
Place a bar magnet in your hands with one end on one edge of the strip and the other end on the other.
Move the magnet along the length of the strip without lifting it until you reach the opposite edge.
Repetition of the preceding stages.
Place the iron fillings on the strip and expand them. If it is attracted, the strip will become magnetised; if not, repeat the procedures a few times more.

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Uses of Magnets

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Chapter 13 Fun with Magnets
Long Answer Questions | Q 15. | Page 83

You are provided with an iron needle. How will you magnetize it?

______ will also get affected by magnetic field.

Analogy:

Electromagnet: Magnetic crane.
Ordinary magnet: ______.

What are the objects affected by a magnetic field?

Give the uses of magnets.

What is meant by a mag-stripe?

In a bar magnet, magnetic attraction is ______ near its ends.

Four identical iron bars were dipped in a heap of iron filings one by one. Figure shows the amount of iron filings sticking to each of them.

Four identical iron bars were dipped in a heap of iron filings one by one. Fig. 13.5 shows the amount of iron filings sticking to each of them.

Which of the iron bars is not a magnet? Justify your answer.

Boojho kept a magnet close to an ordinary iron bar. He observed that the iron bar attracts a pin as shown in the following figure.

What inference could he draw from this observation? Explain.