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Nd-fe-b magnet knowledge Question and answer

Pubdate:2020-11-28Views:51

1. Do you know which objects have magnets on them?

A: Refrigerator door, speaker (speaker), headset, telephone, microphone, microphone, etc.

2. What is the name of the magnet according to its shape?

A: bar magnet, ring magnet, shoe magnet, circular magnet, square magnet, groove magnet, etc.

3. What is the most reliable way to identify iron articles?

A: With a magnet.

4. Which of the following items can be attracted by a magnet?

Iron key iron nail aluminum wire copper wire paper clip glass bead wood piece of paper cloth eraser plastic ruler can tin can Tin can Answer: iron key iron nail paper clip can tin can

5. A hoof magnet is wrapped in paper. Is it still magnetic? Why is that?

A: Yes, a magnet can also attract iron from some objects.

6. What properties do magnets have?

A: A magnet can attract iron; A magnet can also attract iron between objects; Magnets can indicate north and south; A magnet repels with its poles, but attracts with its poles.

7. Why do magnets indicate north and South?

A: The Earth itself is a huge magnetic object, with north and South poles. It interacts with both poles of the compass so that it always points north and south.

8. What materials do I need to make a compass?

A magnet, a steel needle. Press the tip of the needle with your finger and rub the pole of the magnet in one direction over the needle. Repeat 20-30 times.

9. How do you make a compass? Research question: How do you make a compass?

Materials: Steel needle, magnet, plastic bowl, water, blow molding paper, pen manufacturing process:

1. Hold one end of the magnet in your hand and rub the pole of the magnet on the needle in one direction for 20-30 times.

2. If the needle can pick up the pin, the needle is magnetic.

3, the magnetized steel needle inserted in the blow molding paper, put in the water, magnetic needle guide one end, one end points to the north, write on the blow molding paper east, south, west, north each direction, our compass can indicate the direction.

10. Making Principle of compass:

A magnet that rotates freely, when at rest, always guides at one end and points north at the other. We call one end of the compass the South Pole, S, and the North Pole the North Pole, N. The compass is made according to the nature of a magnet to indicate north and south. East E south S West W North N Southeast ES Northeast EN southwest WS northwest WN


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