
#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: 11,989

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: 4,664

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 


Register to reply 
Related Discussions  
induced EMF on a primary coil by a secondary coil  Introductory Physics Homework  1  
Solving for Magnetic Field Strength given Induced voltage in a coil  Introductory Physics Homework  1  
A coil with turns given magnetic field, time find the emf induced in the coil  Introductory Physics Homework  4  
average induced emf in coil  Introductory Physics Homework  1  
Induced Voltage in a coil  Introductory Physics Homework  2 