the combination of electrochemical cells connected together
an aluminum electrode, a copper electrode, and an acidic solution
What do electrochemical cells do?
convert chemical energy into electrical energy stored in charges
the ability to do work
Difference between Kinetic and Potential energy?
Kinetic energy: energy a moving object has because of motion
Potential energy: is energy stored in an object
Define: potential difference
the amount of electric potential energy per one coulomb of charge
device that measures the amount of potential difference between two locations of charge separation
Sources of Electric Energy
Friction, Piezoelectric crystals, Photo-electrochemical cells, Thermocouples, Generators
Two groups of batteries:
Dry: flashlights, potable CD's, watches
Wet: cars, wheelchairs
Difference of electrode and electrolyte
Electrode: the two terminals of a battery two different materials*
Electrolyte: substance that conducts electricity
any device that transforms electric energy into other forms of energy
Components of a circuit
flow of energy
How is electric current measured?
flows from positive to negative
Difference between static electricity and current electricity?
Static: charge that remains stationary on an insulator
Current: continuous flow of charge in a complete circuit
the property of any material that slows down the current
How does resistance affect current?
Higher resistance, slower the current
a circuit that has only one path for current to travel
Rules of series circuit
-sum of voltage loses on the loads equal the total voltage gain
-Current is the same throughout
Rules of a Parallel circuit:
-Loads that are parallel have the same voltage