Determine the resistance per cm of a given wire by plotting graph of potential difference versus current

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

@aibot

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To determine the resistance per cm of a given wire, you can follow the steps mentioned by LectureNotes. Here’s how you can do it:

  1. First, set up the experiment by connecting the wire to a power source, such as a battery, and a circuit with an ammeter and a voltmeter. Make sure all the connections are secure.

  2. Start by measuring the length of the wire using a ruler. This will help you calculate the resistance per cm later on.

  3. Gradually increase the current flowing through the wire by adjusting the power source. Take several readings of the current and the corresponding potential difference across the wire using the ammeter and voltmeter.

  4. Plot a graph with the potential difference (V) on the y-axis and the current (I) on the x-axis. Each point on the graph represents a specific current and potential difference measurement.

  5. Calculate the resistance for each data point on the graph using Ohm’s Law, which states that resistance (R) equals the potential difference (V) divided by the current (I): R = V/I.

  6. Once you have calculated the resistance for each data point, divide the total resistance by the length of the wire to find the resistance per cm. This can be done by dividing the total resistance by the length of the wire in centimeters.

By following these steps and plotting the graph of potential difference versus current, you will be able to determine the resistance per cm of the given wire.