The potential difference between 2 points; measured in volts.
100
Name the 2 types of circuits.
-parallel
-series
100
What is a conductor?
a material in which charges can move freely
100
What unit is electric current expressed in?
amps
100
Name the 3 ways an object can become charged.
-friction
-induction
-conduction
200
What is electric discharge?
The release of electricity stored in a source.
200
What shape must an electrical circuit always form?
a loop
200
True or false: an eraser is an insulator.
True
200
The size of electric force depends on...
-the amount of charge on each object
-the distance between charges
200
What are the 2 kinds of cells?
-wet cell
-dry cell
300
What is resistance?
The opposition presented to by the current by a material or device.
300
What are the 3 basic parts of a circuit?
-energy source
-wires
-load
300
A good conductor has a high or a low resistance?
low
300
What is an electrode?
the part of a cell through which charges exit or enter.
300
How is lightening made?
When the negative charge at the bottom of a cloud induces a positive charge on the g round and the large charge differences create a rapid electric discharge.
400
What is electric power?
The rate at which electrical energy is converted into other forms of energy.
400
What is a use for a series circuit?
a burglar alarm
400
What is a superconductor?
a material with a resistance of 0 ohms.
400
What is an electroscope?
a glass flask with a metal rod in a rubber stopper that is used to see if an object is charged
400
What do all charged objects have around them?
an electric field
500
What is a photocell?
A device that converts light energy into electrical energy.
500
What do you call a switch that automatically opens if the current is too high?
a circuit beaker
500
The higher the temperature, the worse or better an object does at insulating
better
500
The higher the electrical current, the ________.
greater the number of charges that pass the point each second
500
What is the standard voltage in the United States?