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Electromagnetism II


Electromagnetic force 1 of 4 fundamental forces of nature. A push or pull of and object.
Electromotive Force (EMF) Any device that coverts some form of energy directly into electric energy.
Battery Is a source of electro motor force.
Electric field Voltage
Electrons Current
A battery creates _________________________ . Electric field that moves the electrons.
The electric field and the electrons are in the __________ direction. same.
Electric potential is measured in ___________. joules per coulomb or volt
Single unit of electric charge is a ________. Electron
Motor is the ________ of a generator. opposite
A physicists conventional rule for electric current flow. Right Hand Rule
Current flow Movement of electric charge
Electron current flow is considered the ________ rule. Left hand rule
Electric current runs _____________. Positive to negative
Electron current flow runs ____________. Negative to positive
Oersted's Eperiment An electric current produced a magnetic field strong enough to cause a magnetic compass to point toward the wire.
A magnetic field associated with electron current flow through a wire produces a ____________________. magnetic field represented by concentric circles.
Electron current flow runs _______________. North to south
Left hand rule Electron current flow produces magnetic flux line that run clockwise.
Right hand rule Electric current flow produces magnetic flux lines that run counter clockwise.
Each coil has its own _____________. magnetic field
Solenoid Is a helix + Electrical current
Coil of wire helix
As long as there is a magnetic field flowing through the solenoid then there is a ___________. magnetic field
Current flowing through a loop is strongest ________________. In the center of the loop
Solenoid + Iron core Electromagnet
ferromagnetic material Iron
Advantage of an electromagnet It can be turned on and off by varying current flow.
Results from a movement of a magnet in or out of a coil. Electromagnetic Induction
Discovered that if a magnet is moved, a current flows in a coiled wire. Faraday
An electric current is induced to flow in a circuit if some part of that circuit is in a _________________. changing magnetic field
A changing magnetic field can be produced by moving a: 1) and 2) 1) Bar magnet or an electromagnet near a coil of wire. 2) Coil of wire near a stationary magnetic field
Created by: JEN311