Electricity
What is a closed pathway where electrons flow through?
Circuit
A device that attracts certain types of metals and it produces a magnetic field.
Magnets
What electric current reverses its direction in a regular pattern?
Alternating current
A force that opposes motion between two touching surfaces, can cause electrons to be transferred from one object to another.
Friction
Name 3 conductors.
Iron, nickel, cobalt
The region around a magnet where magnetic forces act.
Magnetic field
A net buildup of electric charges on an object.
Static Electricity
A property of matter that affects the flow of electricity; the opposition to the flow of electrons through a conductor; measured in ohms.
Resistance
Name 3 insulators.
Wool, wood, paper.
A property of some materials that have a force of repulsion or attraction between certain like and unlike poles.
Magnetism
A difference in electrical potential, measured in volts with a voltmeter.
Voltage
Energy carried by a transverse wave a semiconductor device that acts like a one way valve to control the flow of electricity in electrical circuits.
Diode
An electrical current that flows through only one direction through a wire.
Direct current
A strong temporary magnet made by inserting an iron or steel core into a wire coil and passing an electric current through the coil.
Electromagnet
A unit of power equal to 1 joule per second, the power dissipated by a current of 1 ampere flowing across a resistance of 1 ohm.
Watt
Transfer of energy that occurs when a force makes an object move; measured in joules.
Work
Parallel Circuit
An electrical circuit where the current flows through more than one path; if one path is interrupted, current will still flow through the other paths.
Series Circuit
An electrical circuit where the current has only one path; if the path is interrupted in any point, it stops the current flow in the entire circuit.
Semiconductor
It is in-between a conductor and an insulator.
Transistor
Semiconductors devices made from silicon and other semiconductors.