BATTERIES
What is a connection of two or more electrochemical cells?
Battery
Electrical energy stored in a cell is in the form of what kind of energy?
Potential energy - it has the potential to do work
What is a conductor
Any material that electrical charges can move through
Describe Ohm's law or provide the equation for Ohm's law
The electric potential difference between two points in a circuit is equal to the current times the resistance between those two points
V = IR
What is power?
The rate of change in energy?
Electrolyte
Electrical energy stored in a battery is called ________
Electric potential energy
What is conductivity?
How easily the charges move through a material
When a current can flow along just one path in a circuit, the circuit is called a ________ circuit
What is the unit for measuring power?
Watt (W)
What are the two types of cells?
Dry Cells
Wet Cells
Where does electric potential energy come from?
The electrons that have stored energy
What is an insulator
a material through which charges cannot travel at all
What happens if one of the loads in a series circuit doesn't work?
We have an open circuit and so the current cannot flow through.
What determines how quickly electrical energy is transformed into other kinds of energy?
Loads
Electrochemical cells convert _________ energy into electrical energy stored in charges
chemical energy
What is the amount of electric potential energy per one coulomb of charge called?
Voltage or potential difference
What is a load?
A device that converts electrical energy into another type of energy
What happens to the total resistance in a circuit when resistors are add in parallel?
The total resistance decreases
How much energy does a 60 W light bulb use every second?
60 J of energy
In a battery, chemical energy separates the ________ and ________ charges at the two electrodes.
positive
negative
The potential energy in the battery depends on what two things?
Potential difference (voltage) and the amount of charge that has been separated
To have an electrical circuit we need what?
load
conductor
closed loop
Describe the current in a series circuit.
The current is the same everywhere in a series circuit
What are the two equations we can use to calculate electrical power?
P = VI
E = Pt