1. To Determine Resistance per cm of A Given Wire by Plotting A Graph for Potential Difference Versus Current

To determine resistance per cm of a given wire by plotting a graph for potential difference versus current

How to determine resistance per cm of a given wire by plotting a graph for potential difference versus current.

Write from below for your practical record.

CONCLUSION

Resistance per cm of the wire is found to be 0.424 Ohm/cm.

The graph between potential(V) versus current(I) is a straight line and from the graph is found to be ______ Ohm.

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PRACTICAL EXAM – 2024

AIM OF THE EXPERIMENT

To determine the resistance per cm of a given wire by plotting a graph of potential difference versus current.

APPARATUS REQUIRED

1. A Voltmeter
2. An Ammeter
3. A Rheostat
4. A Battery (Battery Elliminator)
5. A Resistance Wire
6. Connecting Wires
7. A Meter Scale
8. Connecting Wires

THEORY

Ohm’s law states that the current flowing through a conductor is directly proportional to the potential difference between the two ends of the conductor provided the physical conditions remain the same.

i. e. I \propto V

or V \propto I

\implies V = IR \implies R = \frac{V}{I}

PROBLEM

A wire of length “L” is stretched to double its length. Compare the resistances of the original and stretched wire.