State Ohm's law. Draw a labelled circuit diagram to verify this law in the laboratory. Draw a V-I graph for the same and explain how would you use this graph to determine the resistance of the conductor.
Ohm's law states that the electric current flowing through a conductor is directly proportional to the potential difference across its two ends, when other physical conditions like temperature remains constant.
V∞I
or VI= Constant = R
or V =IR
Thus, the ratio V : I is a constant. This constant called the resistance (R) of the conductor. Circuit diagram for Ohm's law :
Explanation : If a graph is drawn between the potential difference (V) and current (I), the graph is found to be a straight line passing through the origin. This shows that the current is directly proportional to the potential difference.
Calculating the slope of the graph, VI = 0.40.1 = 4 = R
Thus, the ratio VI remains constant. The slope of the V-I diagram gives the resistance (R) of the conductor.
Ohm's law states that the electric current flowing through a conductor is directly proportional to the potential difference across its two ends, when other physical conditions like temperature remains constant.
V∞I
or VI= Constant = R
or V =IR
Thus, the ratio V : I is a constant. This constant called the resistance (R) of the conductor. Circuit diagram for Ohm's law :
Explanation : If a graph is drawn between the potential difference (V) and current (I), the graph is found to be a straight line passing through the origin. This shows that the current is directly proportional to the potential difference.
Calculating the slope of the graph, VI = 0.40.1 = 4 = R
Thus, the ratio VI remains constant. The slope of the V-I diagram gives the resistance (R) of the conductor.
