Advertisements
Advertisements
प्रश्न
You are provided with an iron needle. How will you magnetize it?
Advertisements
उत्तर
- Place the iron needle on the table.
- Take a bar magnet and place one of its poles near one edge of the iron needle.
- Rub from one end to another without changing the direction of the pole of the magnet.
- Repeat the process 30 to 40 times. The needle will be magnetized.
- If it will not attract pin or iron fillings continue the same process for some more time.
APPEARS IN
संबंधित प्रश्न
Take a glass of water with a few pins inside. How will you take out the pins without dipping your hands into water?
Analogy:
Electromagnet: Magnetic crane.
Ordinary magnet: ______.
Give the uses of magnets.
What are the uses of magnets?
What is meant by a mag-stripe?
Write a note on the Mangle train.
The arrangement to store two magnets is shown by figures (a), (b), (c) and (d) in the following figure. Which one of them is the correct arrangement?
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.
The strength of these magnets will be
In a bar magnet, magnetic attraction is ______ near its ends.
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.
