1. FARADAY’S LAW EXPERIMENT REPORT
PURPOSE:
We made this experiment to demonstrate that a magnetic field produces a current,
called induced current.
MATERIALS:
-A socket;
-A generator;
-2 solenoids;
-A “u-shaped” magnet;
-A voltmeter;
-4 wires;
PROCEDURE:
Firstof all we need of a potential difference generator, we plug it into a socket, after
that we take two solenoids, a voltmeter and 4 wires. We connect the first solenoid
to the generator and the second to the voltmeter. At the end we put the u-shaped
magnet into the two solenoids. To startthe observation weturn on the generator to
create a differencepotential and we immediately turn off it.
OBSERVATIONS:
When we turn on or turn off the generator we can observethat the voltmeter
shows a flowing of currentfor somemilliseconds.
CALCULATIONS:
According tothe Faraday, Neumann, Lenz Law we obtain that:
|∆𝑽| =
∆𝝋(𝑩)
∆𝒕
→ ∆𝑽 = −
∆𝝋(𝑩)
∆𝒕
where 𝝋(𝑩) = 𝑵 𝒙 𝑩 𝒙 𝑨
N= Number of coils of the solenoid
B=Magnetic field
A=Areaof the solenoid
2. CONCLUSIONS:
In conclusion we understood that the current was generated by a changing flux of a
magnetic field. This current was also negative, because a f.e.m has always an
opposite sign compared to the magnetic flux that produces it, according to the
energy conservation’s law.
