Lab223 - Faraday's Law

Lab223 - Faraday's Law - Samuel Dzifanu Lab 223: Faradays...

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Samuel Dzifanu Lab 223: Faraday’s Law Faraday’s Law Name : Samuel Dzifanu Objective: The purpose of this experience is to measure the voltage induced in a coil by a changing magnetic field is measured and compared with the predictions of Faraday's Law. The source of the magnetic field will be a pair of Helmholtz coils. Theory: When current, I, runs through a circular coil with N turns each of radius, r, a magnetic field is created. Its strength, B, at the center of the coil, is given by the Biot-Savart Law: = / B Nμ I 2 where µ= 4B × 10^–7 T · m/A is the so called permeability constant. On the other hand, a changing magnetic flux, ф, through a coil of N turns induces an emf, E, given by the Faraday’s Law: =- E Ndфdt where Φ =∫ B d A = BA cos(θ) for a magnetic field (B) which is constant over the area (A). Here θ is the angle between the magnetic field vector and the magnitude of the area vector (A). In this experiment, the area of the field and search coils is constant. The current in the
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This note was uploaded on 09/16/2011 for the course PHYS 121A taught by Professor Opyrchal during the Spring '11 term at NJIT.

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Lab223 - Faraday's Law - Samuel Dzifanu Lab 223: Faradays...

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