Electromagnetic induction near a generator

[silvercrow]

Hi , i am a high school student ( class 10 ) and after reading about electromagnetic induction iwas thinking about what if u place a wire coil connected to a circuit in the magnetic field / near a generator ? Because electricity is turned of for a fraction of a second there will be great variation of magnetic field which would induce current in the coil ? Am i incorrect ?

 

[M Quack]

Yes, in principle. However, well-designed generators and transformers use iron cores to guide magnetic fields lines for maximum efficiency so that the stray magnetic field is very small and not really usable. It may be measureable, though.

http://en.wikipedia.org/wiki/Magnetic_core

 

[silvercrow]

Yes, in principle. However, well-designed generators and transformers use iron cores to guide magnetic fields lines for maximum efficiency so that the stray magnetic field is very small and not really usable. It may be measureable, though.

http://en.wikipedia.org/wiki/Magnetic_core

oo thanks buddy but tell me how much rotation speed of magnets i need to induce a small amount of current like lighting a really small bulb ?

 

[CWatters]

Connect an LED to a small motor from a battery powered toy.

 

[sardar]

Hello, as a scientist, I can confirm that your understanding of electromagnetic induction is correct. When a wire coil is placed in a changing magnetic field, it will induce an electric current in the coil. This is known as Faraday's Law of Induction. So, if the wire coil is placed near a generator, which produces a constantly changing magnetic field, it will indeed induce a current in the coil. This is how generators work to produce electricity. However, the duration and magnitude of the induced current will depend on various factors such as the strength and speed of the magnetic field changes, the properties of the wire and circuit, and the distance between the coil and the generator. I hope this helps clarify your understanding of electromagnetic induction.