current Electricity chapter 34

current

flow of electrons in a wire

conductors

substances that allow electricity to travel through them

insulators

substances that dont allow electricity to travel through them

current

speed at which electrons flow in a wire.

direction of current in circuit

from positive terminal to negative terminal

ammeter

measures current

voltage

the energy given to electrons in order for it to move around the circuit

potential difference

voltage

voltmeter

measures voltage and must be placed in parallel

resistance

the tendency of which the filament resist movement of electrons

measuring resistance

Ohmmeter in units of ohms

equation of voltage

voltage= resistance x current

Ohms law

for a metallic conductor at a constant temperature the current is proportional to the voltage.