Final answer:
Electromagnetic induction is the process of producing an electric current in a conductor by a changing magnetic field. It is demonstrated by various devices like magnets moving in coils and hand-crank generators.
Step-by-step explanation:
Electromagnetic induction is the process by which a changing magnetic field induces an electric current in a conductor. When a magnet moves inside a coil of wire, or when a coil of wire is moved in a magnetic field, the changing magnetic field produces an electric current in the wire. This phenomenon is the basis for the operation of devices such as hand-crank generators and design-and-build generators, where mechanical energy is converted into electrical energy.
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