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
- A Voltmeter
- An Ammeter
- A Rheostat
- A Battery (Battery Elliminator)
- A Resistance Wire
- Connecting Wires
- A Meter Scale
- 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.
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