Calculate voltage induced on a coil

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SUMMARY

The discussion centers on calculating the voltage induced on a coil using Faraday's law of induction, represented by the formula V = -N (dΦ/dt), where Φ is the magnetic flux. The magnetic flux can be expressed as Φ = B A, with B being the magnetic field and A the area of one loop in the coil. Additionally, the conversation highlights the possibility of obtaining a DC voltage from a coil by integrating the voltage signal through an op-amp, resistor, and capacitor setup, particularly when the magnetic field is altered significantly.

PREREQUISITES
  • Understanding of Faraday's law of induction
  • Knowledge of magnetic flux and its components (B and A)
  • Familiarity with op-amp circuits
  • Basic principles of electromagnetism
NEXT STEPS
  • Study the derivation and applications of Faraday's law of induction
  • Learn about integrating circuits using op-amps
  • Explore the effects of magnetic field changes on induced voltage
  • Investigate practical applications of induced voltage in electrical engineering
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Electrical engineers, students studying electromagnetism, and hobbyists interested in coil design and voltage induction techniques.

adilee
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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 can't get from google as well...sorry for trouble n thanks for ur guiding...
 
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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)​
 
Hi adilee
It is possible to get a dc voltage out of a coil, with the addition of an op-amp, 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 volt-seconds is 2 NAB. Put the voltage signal into an integrator circuit, as shown in the attached thumbnails at post #9 in thread
https://www.physicsforums.com/showthread.php?t=352947
and get a dc voltage out.
Bob S
 
Last edited:

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