(3210) Magnetic Induction
Jason Fletcher
James Strath

Abstract


Magnetic Induction

Dictionary definition: An electrical phenomenon whereby an electromotive forced (EMF) is generated in a closed circuit by change in the flow of current.

Textbook definition

(Delmar s Standard Textbook of ELETRICITY Second Edition) The principle of magnetic induction states that whenever a conductor cuts through magnetic lines of flux a voltage is induced into the conductor.

Purpose:

is to explore the text book definition that s states that whenever a conductor cuts through magnetic field (lines of flux) a voltage is induced into the conductor and the factors that determine the Mount of voltage that will be induced in a conductor.

Question:

Does a magnet when passed over a coil of wire create voltage? If a voltage is created, what are the variables to get the most voltage?

Hypothesis:

I think when a magnet when passed over a coil of wire, voltage will be created. I expect the greater turns of wire to make the coil, the faster the magnet spins past the coil of wire, and the closer the magnets are to the coil the greater the voltage will be.

I will make one coil that has 500 turns of wire and another with 1000 turns of wire. Each coil will be wrapped around a steal bar. Then I mounted the coils in a way I could adjust the gap between the magnets and the coils. 1) Using a variable speed electric drill to spin the magnets, voltage readings will be taken at 150 RPM intervals until drill reaches max RPM. I will then adjust the gap between the magnets and the coil then repeat number 1).

Procedures:

1) The first test
Set no gap between the coils (500turns and 1000 turns) and magnets Spin the magnets at 150 RPM increments to a max of 2250 RPM Measure the voltage with a multi meter at each increment Record results.

2) The second test
Set ¼ gap between the two coil (500turns and 1000 turns) and magnets Spin the magnets at 150 RPM increments to a max of 2250 RPM Measure the voltage with a multi meter at each increment Record results

3) The third test
Spin the magnets at max RPM Connect the light bulb to the 1000 turn coil Observe light for brightness Record results Connect the light bulb to the 500 turn coil Observe light for brightness Record results

Conclusion:

This experiment proves that when a coil of wire passes throw a magnetic field a voltage is induced into the conductor. As the magnets spins faster past the coil the voltage increases. The data shows that more voltage is induced with no gap between the coil and magnet then ¼ gap. Also there is more voltage induced when the coil has more turns of wire.