When the wire touches the top of the battery and the magnet, it is making a circuit, which allows electrons to flow – this is the current. This force, which is called a Lorentz Force, acts on the wire and causes it to move, which makes the wire spin around.

This means you would have to bring a very large magnet very close to a hard drive in order to delete files. As long as you don’t unscrew the top cover of the hard drive, you won’t be able to get close enough. A strong magnetic field, however, can damage mechanical components of the hard drive.

By attaching circular magnets to an AA battery, you can make a little homopolar motor that uses an electric current and magnetic field to propel itself across a conductive surface. …

The magnets are attracted and stick to the steel parts of the battery. When this stack of batteries and a magnet is placed on a thin layer of conductive aluminum foil, an electric current runs through the foil. In the presence of the magnetic field, this current makes a force that propels the car.

The idea stems from old gadgets like televisions, when much of the data was stored magnetically, using tiny bits of iron. However, with all the latest technological advancements, the truth is magnets won’t interfere with your smartphone.

And yes, magnets can ruin your microwave. But, of course, we are talking about neodymium magnets. The microwaves that heat the interior are electromagnetic radiations, similar to radio waves. However, if you place metal in the oven, it would deflect the waves away from the food.

Li-ion batteries are made with two primary ingredients, Lithium and Carbon/Graphite. Lithium is an alkali metal, which means it is not magnetic. When you add a magnetic charge to lithium, it will not make and difference. There is also carbon inside lithium-ion batteries.

Electromagnets create a magnetic field through the application of electricity. When you introduce the current, either from a battery or another source of electricity, it flows through the wire. This creates a magnetic field around the coiled wire, magnetizing the metal as if it were a permanent magnet.

Exposure to magnets can render your card’s electronic data unreadable by some machines. Magnetic dangers for credit cards lurk far and wide — in stores, hospitals and homes. Both the strength of a magnet and the amount of exposure to the magnetic force affect the strip on the card.

9 Ways You’re Accidentally Damaging Your Smartphone

1. Installing malware.
2. Leaving your phone plugged in.
3. Allowing your phone to overheat.
4. Dropping your phone, even if it’s in a case.
5. Exposing your phone to liquids.
6. Keeping your phone on 24/7.
7. Leaving your phone on the couch (or keeping it in your pocket)

No, it is not bad to put magnets on the fridge. It has no effect on the function of the fridge. It is safe to say, that fridge magnets do not harm the function of your fridge, and you can still use neodymium magnets to pin stuff on your fridge.

A battery cannot be discharged by proximity to a magnetic field. However, if you were to put a magnet across the terminals of a battery, the magnet, being metal, will conduct electricity and the battery will get VERY hot.

Of course, if you have watch batteries that contain iron, as a rule of thumb, the batteries will congregate around any magnet (if the batteries are exposed to the magnets). The batteries may get drained as a result of contact with each other, and not as a result of the magnet upon which they rest.

A static magnetic field will only produce a drain for a split second, which will not significantly affect a cellphone battery. An electronic device is not normally sensitive to static magnetic fields in and of itself.

The reverse can also be true; a magnetic field may also induce a current through induction that can overdraw the battery of any electronic device. But then, although each current can generate a magnetic field, it is only a change in magnetic force, also called “flux”, that can generate a current according to Faraday’s law.