2006-12-23 02:36:59 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Electromagnetic induction refers to production of current due to a magnetic field
A magnet has a number of lines of force passing normally through it called magnetic flux . Current is produced due to change in magnetic flux
When a magnet is kept close to a coil in stationary position there is no change in magnetic flux but when the magnet is moved towards or away from the coil there is in magnetic flux due to which emf is produced which ultimately results in the production of current called induced current. This is electromagnetic induction.
2006-12-23 03:41:43 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Electromagnetic induction is an incredibly useful phenomenon with a wide variety of applications. Induction is used in power generation and power transmission, and it's worth taking a look at how that's done.A electric motor is a device for transforming electrical energy into mechanical energy; an electric generator does the reverse, using mechanical energy to generate electricity. At the heart of both motors and generators is a wire coil in a magnetic field. In fact, the same device can be used as a motor or a generator.
When the device is used as a motor, a current is passed through the coil. The interaction of the magnetic field with the current causes the coil to spin. To use the device as a generator, the coil can be spun, inducing a current in the coil.
Coils, transformers, generators and motors can be used for more things that you can imagine and all work on the theory of electromagnetic induction.
2006-12-23 11:03:56 · answer #2 · answered by ? 1 · 0⤊ 0⤋
There is no reason for it; it's just a property of the universe we live in . Faraday found that a current causes an electric field and a changing current causes a changing magnetic field that can cause another changing current at a distance. It's all wrapped up in Maxwell's equations.
2006-12-23 11:16:10 · answer #3 · answered by Gene 7 · 0⤊ 0⤋
>when time varing current passing throgh any conductor it produce time varing megnetic field.
>This time varing magnetic field couses variation in numbers of lines of force per unit area, known as flix density variation.
> This time varing flux density is the reason for electomagnetic induction.
2006-12-23 13:50:32 · answer #4 · answered by imgujju 2 · 0⤊ 0⤋
The best way to understand electrodynamics is through the perspective of special relativity.
2006-12-23 14:09:17 · answer #5 · answered by robert 3 · 0⤊ 0⤋
Will you please get on with life, pal?
2006-12-23 10:46:27 · answer #6 · answered by Anonymous · 0⤊ 0⤋