P4 electricity circuits Flashcards
1
Q
what is electric current
A
the flow of electrical charge
2
Q
what is the equation for charge flow
A
current x time
3
Q
why is the current the same at all points in a series circuit
A
it has no where else to go
4
Q
what is the resistance
A
the measure of how it resists the flow of charge
5
Q
what happens when the resistance is higher
A
difficult for charge to flow
lowers the current
6
Q
what is potential difference
A
tells us the difference in electrical potential from one point in the circuit from another
7
Q
what happens when the potential difference is bigger
A
greater the flow of charge
bigger the current
8
Q
what is the equation for potential difference
A
current x resistance
9
Q
what is an ohmic resistor
A
the current is directionally proportional to the potential difference at a constant temperature
