thank you :DTSny said:Hello, and welcome to PF!
Yes, you are right. For some circuits, the induced emf might be very small.
Noctisdark said:You can, but a poor way of inducing current, you can't switch very fast and the coil in your circuit won't make it so perfect, you end up with few milli volts !
Induced e.m.f, or electromotive force, is a phenomenon in which a changing magnetic field creates an electric field and induces a voltage in a conductor.
Regular e.m.f is produced by a source such as a battery, while induced e.m.f is created by a changing magnetic field.
The strength of the magnetic field, the velocity of the conductor, and the angle between the magnetic field and the conductor all affect the magnitude of induced e.m.f.
Faraday's law states that the magnitude of the induced e.m.f is directly proportional to the rate of change of the magnetic field and the number of turns in the conductor.
Induced e.m.f is used in generators to produce electricity, in transformers to change the voltage of an electric current, and in induction cooktops to heat up cooking vessels.