# Object being magnetise from afar

• Neutrino98
In summary, it is possible to magnetize something from afar with a strong magnet, but the amount of tesla needed would depend on the desired level of magnetism and the distance of the object. A workshop owner discovered that his FM radio and compasses were affected by a nearby lightning strike, and was able to remagnetize them himself using a soldering gun. However, the exact field strength required for this process is unknown and could potentially be measured using a hacksaw blade and an open coil.
Neutrino98
Is it possible to magnetize something from afar with a strong magnet. If it is possible, how much tesla will it need?

Could you be just a bit more vague in your question? How much magnetism do you want to induce? How far away is "afar"? An inch? A mile? From the other side of the earth?

The Earth's magnetic field is very weak (relatively speaking) but it magnetizes rocks in the Earth's crust (weakly) over long periods of time, so I'd say yes, you definitely can do it, BUT I doubt you can induce much magnetism from any substantial distance.

I walked into my workshop one day after a thunderstorm and found the FM radio wouldn't work. I opened it and found capacitors in the tuner blown apart , pesumably by a lightning strike in vicinity of my outdoor antenna.

Next day i noticed two magnetic compasses i keep near workbench pointed South instead of North. I called Silva and spoke with their engineer, he said to send them back for remagnetization.

I did it myself with a soldering gun. Found it quite easy.

but i have no idea as to field strength required.
For fun, take a soldering gun and hacksaw blade and feel how strong it vibrates when held near the high current heating element. You could measure flux with an open coil and calculate a ballpark answer i think. That'd give a number for the iron in compass needles, at least.
just an approach .

## 1. How does an object get magnetized from afar?

When a magnet is brought near an object, the magnetic fields of the magnet interact with the atoms in the object. This causes the alignment of the atomic dipoles within the object, resulting in magnetization.

## 2. Can all objects be magnetized from afar?

No, not all objects can be magnetized from afar. Only objects made of ferromagnetic materials, such as iron, nickel, and cobalt, can be magnetized from a distance. Other materials, such as copper or aluminum, are not affected by magnetic fields and cannot be magnetized.

## 3. How far away can a magnet be to magnetize an object?

The distance at which a magnet can magnetize an object depends on the strength of the magnet and the material of the object. Generally, the closer the magnet is to the object, the stronger the magnetic field and the easier it is to magnetize the object. However, stronger magnets can magnetize objects from farther distances.

## 4. Can an object be magnetized from afar without touching it?

Yes, an object can be magnetized from afar without touching it. As long as the magnetic field of the magnet can reach the object, it can magnetize it. This is why magnets can attract or repel each other without making direct contact.

## 5. Can an object lose its magnetization from afar?

Yes, an object can lose its magnetization from afar. This can happen if the object is exposed to high temperatures or strong magnetic fields in the opposite direction. The atoms in the object will lose their alignment, resulting in demagnetization.

• Electromagnetism
Replies
27
Views
1K
• Electromagnetism
Replies
11
Views
1K
• Electromagnetism
Replies
14
Views
276
• Electromagnetism
Replies
7
Views
1K
• Electromagnetism
Replies
11
Views
1K
• Electromagnetism
Replies
3
Views
5K
• Electromagnetism
Replies
5
Views
1K
• Electromagnetism
Replies
4
Views
7K
• Electromagnetism
Replies
17
Views
2K
• Electromagnetism
Replies
21
Views
2K