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Induced Emf?
The Problem I was Given: A coil is wrapped with 147 turns of wire on the perimeter of a square frame of sides 10.4 cm. Each turn has the same area, equal to that of the frame, and the total resistance of the coil is 2.58 Ohms. A uniform magnetic field is turned on perpendicular to the plane of the coil. If the field changes linearly from 0 to 0.912 Wb/m^2 in a time of 0.755 s, find the magnitude of the induced emf in the coil while the field is changing. Answer in units of V.
My initial thoughts were to disregard the number of loops and resistance, multiplying the area of the square by 0.912 Wb/m^2 to give the change in flux. Then, I divided the change in flux by the change in time to give what I had believed was the induced emf, but this appears to give the wrong answer, what am I overlooking?
2 Answers
- polloloco.rb67Lv 41 decade agoFavorite Answer
I believe you are correct in disregarding the resistance, but the number of coils needs to be factored in the equation. Emf increases proportionally with the number of turns.
e = -N [delta](BA cos(phi))/[delta]t
check my source for a good explanation. It'll walk you through the problem.
- Anonymous4 years ago
Emf is the aptitude distinction between the two electrodes of a cellular or source whilst that's open it extremely is not any modern-day is drawn from it. precipitated emf is the emf enhanced in a conductor or in a circuit using alter in magnetic flux which added relies upon upon magnetic field, area of the coil or conductor and its orientation with the path of the magnetic field additionally.
