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प्रश्न
Take a glass of water with a few pins inside. How will you take out the pins without dipping your hands into water?
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उत्तर
If we keep a strong bar magnet above the glass of water, all pins inside the water come up and attract the magnet.
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संबंधित प्रश्न
______ will also get affected by magnetic field.
Analogy:
Electromagnet: Magnetic crane.
Ordinary magnet: ______.
What are the objects affected by a magnetic field?
What type of magnet is used in the Mangle train?
What is meant by a mag-stripe?
Write a note on:
Magstripe:
Three magnets A, B and C were dipped one by one in a heap of iron filing. Figure shows the amount of the iron filings sticking to them.
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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.
