electricity

Cards (18)

what is electric current? 
a flow of charge
what is current measured in? 
amps (A)
what is potential difference? 
a measure of energy flowing through a part of the circuit
what is potential difference measured in? 
volts (V)
what is resistance? 
how much a component restricts the flow of electrons
what is resistance measured in? 
ohms
formula for charge flow? 
current x time
formula for potential difference? 
current x resistance
what is power measured in?
watts (W)
what is energy measured in?
joules (J)
what is a series circuit? 
one closed loop
what is a parallel circuit? 
two or more closed loops
in a series circuit, current is… 
the same everywhere
in a series circuit, the potential difference… 
adds up to give the total potential difference
in a series circuit, resistance of components… 
add to give the total resistance
in a parallel circuit, total current is… 
the sum of the currents in the branches
in a parallel circuit, the potential difference is… 
equal
in a parallel circuit, resistance is… 
smaller than the resistance of either component