Electromagnetic induction is the generation of an electrical current using magnetism.
After scientists discovered that an electrical current creates a magnetic field, they continued their experimentation and were able to demonstrate that the opposite is also true: a magnetic field can generate an electrical current. This process is called electromagnetic induction.
There are two ways to produce an electric field from a magnetic field:
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by moving a conductor inside a magnetic field;
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by moving a magnet around a conductor.
Electromagnetic induction is widely used to transform mechanical energy into electrical energy.
Hydroelectric power plants use electromagnetic induction to generate electricity.
The water (5) arrives at the dam and flows through the turbine (B). The force exerted by the water causes the blades (4) of the turbine to rotate. The mechanical energy of the blade is transferred to the alternator (A). The alternator has two main components: a moving rotor (2) with electromagnets and a stationary stator (1) with copper bars. When the rotor spins in the stator, the electrons in the copper bars begin to vibrate. This vibration movement is what creates an electrical current.
