Advertisements
Advertisements
प्रश्न
Take a glass of water with a few pins inside. How will you take out the pins without dipping your hands into water?
Advertisements
उत्तर
If we keep a strong bar magnet above the glass of water, all pins inside the water come up and attract the magnet.
APPEARS IN
संबंधित प्रश्न
You are provided with an iron needle. How will you magnetize it?
______ will also get affected by magnetic field.
What are the uses of magnets?
What type of magnet is used in the Mangle train?
What is meant by a mag-stripe?
Write a note on:
Magstripe:
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.
- Which of the iron bar is likely to be the strongest magnet?
- Which of the iron bars is not a magnet? Justify your answer.
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.
Describe the steps involved in magnetising an iron strip with the help of a magnet.
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.
