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Calculate voltage induced on a coil 
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#1
Nov1209, 01:53 AM

P: 1

Hi, i m new here n very poor in EE.. just want to ask that, is there any formula for us to calculate voltage induced on a coil if we have the info like the number of turns of the coil n the flux (mWb/sec)..
cos i cant get from google as well...sorry for trouble n thanks for ur guiding... 


#2
Nov1209, 08:03 AM

Mentor
P: 12,064

This is Faraday's law of induction.
V = N (dΦ/dt)where Φ = B A(B is the magnetic field, and A is the area of 1 loop in the coil) For a fixed area A, this becomes V =  N A (dB/dt) 


#3
Nov1209, 08:23 PM

P: 4,663

Hi adilee
It is possible to get a dc voltage out of a coil, with the addition of an opamp, a resistor and a capacitor. If the change in the field in the coil (by flipping it 180 degrees) is 2B, the coil area is A, and the number of turns is N, then the voltseconds is 2 NAB. Put the voltage signal into an integrator circuit, as shown in the attached thumbnails at post #9 in thread http://www.physicsforums.com/showthread.php?t=352947 and get a dc voltage out. Bob S 


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