You need to rub the needle with a magnet or you can use coil around the needle and pass current to make it a electro magnet.
Rub the needle across a magnetic surface...always in the same direction, don't go back and forth. This will magnetise the needle. Then float the needle in a dish of water. And presto you have your own compass
There are several ways. 1. Stroke the needle in one direction, with another magnet. 2. Place it in a coil of wire and pass a large (DC) current through the coil for a few seconds. (This is how they would do it commercially) 3. Align the needle with the magnetic north/south direction, now hit it several times. It will eventually take on the earths magnetic field as it's own.
The verb form for "magnet" is "magnetize."
The needle in a compass is typically called a magnetic needle or magnetic pointer.
A needle on a compass is a magnet, and it aligns itself with the Earth's magnetic field. This allows the needle to point towards the magnetic North Pole. The movement of the needle is a result of the interaction between the Earth's magnetic field and the magnetic properties of the needle.
stroke it one vay repeatedly against a magnet
Rub the needle across a magnetic surface...always in the same direction, don't go back and forth. This will magnetise the needle. Then float the needle in a dish of water. And presto you have your own compass
The magnetic materials which can magnetise and de-magnetise easily are called "soft magnetic materials" example:-ferrites,iron-cobalt alloy. The magnetic materials which cannot magnetise and de-magnetise easily are called "hard magnetic materials" example:-aluminium(al),nickel-cobalt alloy.
Rub the iron needle along one direction on the strong bar magnet repeatedly until it becomes magnetized. Make sure to always rub it in the same direction to ensure a consistent magnetic field. This process aligns the magnetic domains within the iron needle, causing it to become permanently magnetized.
Iron.
There are several ways. 1. Stroke the needle in one direction, with another magnet. 2. Place it in a coil of wire and pass a large (DC) current through the coil for a few seconds. (This is how they would do it commercially) 3. Align the needle with the magnetic north/south direction, now hit it several times. It will eventually take on the earths magnetic field as it's own.
The verb form for "magnet" is "magnetize."
Electromagnets are only magnetised while the electrical current is switched on.
hold a piece of iron or magnesium up to it and if it attracts it is magnetic
A hypotonic needle is a needle that is a non coring needle. A hypertonic needle is a coring needle. Both of these needles are used in IV's with a hypotonic needle used for hypotonic solutions.
a teasing needle is a needle that is use when dissecting something
A hypodermic needle. a record player needle