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How a generator works
Physics 1010 M.W.F.
Jordan Roe
David Schaffer
Electric current is the flow of charge pressured into motion by voltage. Electrons in
wires are conductive electrons that can be influenced to move either by being pushed or
driven. When there is potential differences charged electrons flow. The flow creates an electric
charge, but without potential difference there would be no charge.
The rate in electrical flow is measured by amperes, amperes can be easily doubled by
having a cross section of two wires in the influence of potential difference. Voltage makes
electric pressure and helps move the electrons through a circuit. Electric resistance defines the
conductive properties and potential flow of charges. Resistance of a wire depends not only on
its conductive material properties, but also on its length and width. Thick is less resistant then
thin and longer is more resistant then short.
Electric resistance is measured by ohms Ω. Named after George Simon Ohm, who
discovered important relationships with voltage, current, and resistance. Ohm’s law is the
current in a circuit is proportional to voltage across the circuit and proportional to resistance in
a current. Meaning Current=Voltage/Resistance with a constant resistance, current and
voltage are the same. Increasing current increases voltage, but increase the resistance will
decrease the voltage a current.
Generators are machines that produce electrical current either by using a stationary
magnetic field with a rotating coil or a moving magnetic field with a stationary wire. We now
know that potential difference makes electricity change. Difference in magnetic fields can
create potential difference in a wire, making electromagnetic induction that will create voltage
and current. Introducing a magnetic field near or threw a wire will create a voltage. Meaning
Voltage induced~area of loops x ∆magnetic field/∆time. Faraday’s law of inducing of electric
field. Maxwell’s law show that the best way of direction of induced magnetic field and electric
field are right angles.
My generator has a stationary cross over wires and a rotating magnetic field. My
magnetic field was connected to chain that connected to bike peddles. I spun the bike peddles
to create potential difference and electric induced magnetic field. The faster I spun the higher
the voltage got. The highest voltage I obtained was 1.6V. The most led lights I demonstrated
was 3 even though it was very brief I still am proud of it. This experiment sounded easy to me at
first, but ended up being a big pain in the butt sometimes. The experiment was worth it though
I enjoyed making electricity on my own. It is something I will never forget about.