Resistance and ohms law Flashcards
1
Q
When current is plotted against voltage the graph will be a straight line through the
A
Origin
2
Q
The gradient (slope of the line equals the…
A
Resistance of the conductor
3
Q
Resistance is defined as…
A
The ratio of the voltage across an object to the current through it
4
Q
Equation for resistance
A
R=V/I
5
Q
Ohms Law- The current flowing through a metal conductor is directly proportional to the..
A
Potential difference provided all physical conditions (especially temperature) are kept CONSTANT
6
Q
Equation for Ohms Law
A
V=IR
7
Q
In series Rtotal =
A
R1 + R2 + R3 + …
8
Q
In parallel 1/Rtotal =
A
1/R1 + 1/R2 + 1/R3 + …
9
Q
Series and parallel combinations Rtotal =
A
R + 1/R1 + 1/R2 …
