When an object becomes charged, charge is neither created nor _____.
Destroyed
100
Do LIKE poles attract or repel?
A. Repel
B. Attract
C. none of the above
A. Repel
100
-Accumulation of excess electric charge on an object.
Static Electricity
100
-exerts a force on other magnets and objects made of magnetic material. A magnet is surrounded by this.
Magnetic Field
200
_____ is measured in amperes.
Current
200
-A material in which electrons are able to move easily.
Conductor
200
-Temporary magnet made by wrapping a wire coil carrying a current around an iron core.
Electromagnet
300
Households are usually wired with _____ circuits. Why?
Parallel.
Becuase in a series circuit the current has only one loop to flow through. In this case, if one light went out, they all would.
300
-Related to the force that causes electric charges to flow.
Voltage Difference
300
-Device that uses an electomagnet to measure electric current.
Galvanometer
400
____ are used in all types of industry, agriculture, and transportation, including airplanes and automoblies.
Electric Motor.
400
-States that the current in a circuit equals the voltage difference divided by the resistance.
Ohm's Law
400
-A large wheel that rotates when pushes by water, wind, or steam.
Turbine
500
Working independently in 1831, Michael ______ in Britain and Joseph ______ in the United States both found that moving a loop of wire through a magnetic field caused an electric current to flow in the wire.
Faraday
&
Henry
500
-Rate at which electrical energy is converted to another form of energy.
Electric power
500
-Generation of a current by changing magnetic field.