Which graph represents the relationship between the potential difference applied to a copper wire and the resulting current in the wire at constant temperature?

since copper wire non-ohmic then the answer is 2. As the voltage across a non-ohmic conductor such as a bulb increases, the electrons carry more energy. When they collide with metal atoms in the conductor, they transfer more energy. This makes the atoms vibrate more and more. This increases the resistance and the temperature, and causes the shape of the graph seen above.

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ap8997154 ap8997154 · Answer 2 · 2022-01-27T07:24:32+01:00

To solve the question we must know about the ohmic conductor.

What is an ohmic conductor?

An ohmic conductor is defined as a two-terminal device in which the voltage or current characteristics have a straight line passing through the origin. Pure metals for example copper, silver wire and tungsten are Ohmic conductors as they obey the ohm's law completely.

They need constant pressure and constant temperature to follow ohm's law.

Copper wire

In a copper wire, a linear relationship is exhibited between the current flowing through it and the voltage across it, therefore, it is an ohmic conductor which is used for making connections between different electrical and electronic components, etc

Which graph?

As given in the question the relationship is at constant temperature but it is not clear about the pressure being constant. therefore, option 2 is the right answer.

Learn more about Ohmic Conductor:

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