Ohm’s law
Potential difference across a conductor is directly proportional to the current in the conductor at constant temperature
Ohmic conductor
Conductor that obeys ohms law. Resistance remains constant when voltage is varied over the resistance OR current is increased.
eg copper wire
Non-ohmic conductor
Does not obey ohms law. resistance is not constant when voltage is varied across it.
eg. diodes and transistors
Power
rate at which work is done
what divides voltage?
Seires circuits
what divides current?
Parallel circuits