The graphs between current (I) and voltage (V) for three linear resistors 1, 2 and 3 are given below: If R 1, R 2and R 3are the resistances of these resistors, then which one of the following is correct?
R 1< R 3< R 2
CONCEPT:
- Ohm’s law: At constant temperature , the potential difference across a current carrying wire is directly proportional to current flowing through it .
- V = IR
Where V is the potential difference , R is resistance and I is current .
EXPLANATION:
We have graph between Current (I) and potential difference (V):
As V = IR
So I = V/R
The above relation of I and R is a straight line equation in which 1/R gives the slope of the line .
Slope of graph = 1/R
From the given graph in the question, as slope of graph 1 is maximum and then it is of graph 3 and slope of graph 2 is minimum .
∴ Slope of graph 1 > slope of graph 3 > slope of graph 2
So 1/R 1> 1/R 3> 1/R 2
Hence R2 > R 3> R 1Similar Questions
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