Year8-Resistance Flashcards
1
Q
What is resistance measured in?
A
Ohms, (omega sign)
2
Q
What is the formulae for current?
A
Current(A)=potential difference(V) /Resistance(omega)
3
Q
Formulae for resistance
A
Potential difference(V)/current(A)
4
Q
Formulae for potential difference?
A
Current(A)*Resistance(omega)
5
Q
If the resistance is lower, what does it mean?
A
The electrons are passing through easily.
6
Q
If the resistance is higher, what does that mean?
A
The electrons find it hard to get through
7
Q
Why do electrons find it harder to get through a larger circuit?
A
They are colliding with the ions of the metal
8
Q
Are metals good conductors?
A
Yes because they have low resistance
9
Q
Is the air usually an insulator?
A
Yes
