Nothing will change. Magnets will only attract magnetic substances, and water is not magnetic, so even if the magnet is placed on water, it will not cause any change.
The components of magnets are iron, cobalt, nickel and other atoms. The internal structure of atoms is relatively special and they themselves have magnetic moments. Magnets can generate a magnetic field and have the property of attracting ferromagnetic substances such as iron, nickel, cobalt and other metals.
Classification of magnets: Magnets can be divided into “permanent magnets” and “non-permanent magnets”. Permanent magnets can be natural products, also called natural magnets, or they can be artificially made. Non-permanent magnets, such as electromagnets, only become magnetic under certain conditions.
Electricity originally existed in nature.Later, people gradually studied it and were finally able to produce it themselves.
Electricity is produced by an electromagnetic induction generator using magnets and coils, which was researched and invented by Faraday.
Electricity used today can be roughly divided into electricity generated by generators and electricity converted from chemical energy (such as batteries). In addition, electricity is also produced from sunlight, and other methods of generating electricity are still under development. ?
Of course, the electricity used in homes is produced by generators. ?
Now let’s talk about the principles of electricity generation! ?
To produce electricity, you need magnets and coils that generate electricity. ?
Magnets have a magnetic force that attracts iron and other metals. The range reachedby this force is called magnetic field. ?
Move the coil in this magnetic field and the coil will generate electricity. However, in a strong magnetic field, if the coil cannot be moved (without causing a change in magnetic force), electricity cannot be produced. ?
In other words, changes in magnetic force cause the coil to generate electricity. This principle is called electromagnetic induction and the current generated is called induced current. ?
When the magnet is close to the coil, current will flow to the coil in the direction of the arrow. ?
Conversely, if the magnet is moved away from the coil, current will flow in the opposite direction of the arrow. Of course, if the magnet is not moved, the magnetic field will not change and no electricity will be generated. ?
This electromagnetic induction can also be used in a simple generator for bicycles. ?
If youIf you install a generator on the tire of a bicycle, the magnet inside the generator will rotate with the help of the rotation of the tire. At this time, the strength of the magnetic field near the coil changes, which can cause an induced current to flow to the coil. ?
This is the principle of electricity production, which can turn on the bicycle lights. ?
What is closely related to the production of electricity is the generator of the electricity company. ?
Hydroelectric power generation uses hydraulic power to turn a propeller mounted on a generator, replacing the rotation of bicycle tires, causing the magnet to rotate and produce electricity. ?
Thermal or nuclear power generation first uses an atomic boiler or furnace to create high temperatures, then uses the heat to evaporate water to produce steam, which is forced towards a turbine installed on thegenerator.Injection can turn the generator and produce electricity.