state ohms law. how can you determine resistance from this law. verify it by graph.
Answers
Answer:
It is a relationship between current (I) potential difference (V) and resistance (R) in an electric circuit.
It was developed by German physicist George Simon ohm in 1826
Explanation:
According to this law ,
"At constant temperature the current flowing through a conductor is directly proportional to the potential difference across the conductor.
S.I. Unit of resistance =Ohm
From ohm's law
R=V/I
If V=1 volt
I=1 ampere
then,R=1 volt/1 ampere
or ,1ohm=1 volt/1 ampere
I-V Graph
Plot V on x -axis and I on y-axis when all the points are joined then ,a straight line passing through the origin is obtained.
This show that current passing through the resistance is directly proportional to the (pd) V across it.
Hence,the slope of this straight line plot is related to the resistance by the relationship.
Resistance (R)=1/slope of the straight line
I hope it helps you
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