While stud dying the dependence of potential difference (V) across a resistor on the current
(I) passing through it, in order to determine the resistance of the resistor, a student took
5 readings for different values of current and plotted a graph between V and I. He got a
straight line graph passing through the origin. What does the straight line signify? Write
the method of determining resistance of the resistor using this graph.

Explanation

To solve the problem, we need to analyze the relationship between potential difference (V) and current (I) in a resistor, and how to determine the resistance from the graph plotted between these two quantities.

### Step-by-Step Solution:

1. **Understanding the Graph**:
- The student plotted a graph of potential difference (V) on the y-axis and current (I) on the x-axis.
- The resulting graph is a straight line that passes through the origin (0,0).

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