PHYSICS Electricity resistance

HideShow resource information
How is resistance measured?
Ohms Ω
1 of 6
what increases the resistance of a wire?
1. The length of the wire increases 2.The thickness of a wire decreases
2 of 6
How does the resistance of a longer wire change?
It is greater because electrons collide with ions more often.
3 of 6
How does the resistance of a thinner wire change?
It is greater because the thinner wire has less electrons to carry the current.
4 of 6
What is the equation for Resistance?
R=P.D(measured in V, volts) % Amps
5 of 6
What is the equation for P.D(potential difference)?
Amps X Resistance.
6 of 6

Other cards in this set

Card 2

Front

1. The length of the wire increases 2.The thickness of a wire decreases

Back

what increases the resistance of a wire?

Card 3

Front

It is greater because electrons collide with ions more often.

Back

Preview of the back of card 3

Card 4

Front

It is greater because the thinner wire has less electrons to carry the current.

Back

Preview of the back of card 4

Card 5

Front

R=P.D(measured in V, volts) % Amps

Back

Preview of the back of card 5
View more cards

Comments

No comments have yet been made

Similar Physics resources:

See all Physics resources »See all Electricity resources »