What would happen if you stroke a needle with a magnet?
When you have a magnetized needle, it will point magnetic north and south, but you will not know which end is pointing north. Since opposite poles attract, the north-seeking pole of a magnet would cause the end stroked to become the south-seeking pole, which would seek the south magnetic pole.
What would cause a needle to become magnetized?
Magnetism is caused by the motion of electric charges. Every substance is made up of tiny units called atoms. Each atom has electrons, particles that carry electric charges. To become magnetized, another strongly magnetic substance must enter the magnetic field of an existing magnet.
Is a needle magnetic?
When you rubbed the magnet against the sewing needle, you magnetized the needle, effectively making it a weak, temporary magnet. Because magnets interact with one another (pushing against one another or pulling one another together), the magnetized needle can interact with Earth’s magnetic field.
How can you tell if a needle is magnetized?
Carefully holding the sewing needle by the eye (with the point facing away from you), swipe it along one side of the magnet in the same direction 30 to 40 times (this action makes the needle magnetic). If you want to test the needle’s magnetism, see if it will attract a straight pin.
How can you magnetize a needle without a magnet?
Alternatively, you can magnetize a needle by rubbing it against your hair, some animal fur, or silk. Carefully hold the sharp point of the needle and rub just the eye of the needle 50 to 100 times against the hair, fur, or silk.
What is needle shaped magnet?
: a bar magnet or a set of bar magnets so suspended as to indicate the direction of the magnetic field in which it is placed especially : such a magnet that is slender and pointed at the ends and used as a compass.
How do you make a magnet with a needle?
Have a go
- WHAT YOU NEED: A bowl of water, cork, sewing needle and a compass. 1 of 5.
- Rub the needle 50 times along the magnetic strip on a fridge door.
- Place the magnetised needle onto the piece of cork.
- Gently place the needle and cork into the bowl of water.
- The needle will turn and then come to a complete stop.
What is the use of magnetic needle?
a slender magnetized steel rod that, when adjusted to swing in a horizontal plane, as in a compass, indicates the direction of the earth’s magnetic fields or the approximate position of north and south.
How do you make a magnetic needle?