Dynamo consists of rotating head with the magnet inside it. An insulated copper wire wounded around soft iron is kept below the magnet. This all system is sealed within an aluminium pot. When head rotates with the help of wheel, magnet also moves. This causes the change in magnetic flux and emf induced. Thus, induced current is flow through the wire to the bulb.
A voltage is produced when a magnet moves in a coil of wire. Instead, generators induce a current by spinning a coil of wire inside a magnetic field, or by spinning a magnet inside a coil of wire. ... As this happens, a potential difference is produced between the ends of the coil, which causes a current to flow.Dynamo - a device that makes direct current electric power using electromagnetism. It is also known as a generator, however the term generator normally refers to an "alternator" which creates alternating current power.
A dynamo is an electric generator that produces direct current using a commutator. ... The dynamo uses wire coils that rotate creating a magnetic field. This action converts the mechanical energy of the rotation to a direct electric current.Dynamos are divided into two general lands: direct current (D. C.) and alternating-current dynamos (A. C.) or simply alternators.
the basic role of the dynamo in cars is that it takes the mechanical energy form the car as input and gives the output as electrical energy and that electrical energy is stored in a battery and that is used for emergency purpose.In the early 1830s, Michael Faraday performed his seminal experimental research on electromagnetic induction, in which he created the first electric dynamo—a machine for continuously converting rotational mechanical energy into electrical energy.