What is the effect of temperature on resistance?

The resistance of a material increases with an increase in temperature.

When a material is heated, the atoms within it vibrate more vigorously, causing more collisions between the electrons and the atoms. This results in a greater resistance to the flow of current, as the electrons have to work harder to move through the material. This effect is known as the temperature coefficient of resistance.

The temperature coefficient of resistance is a measure of how much the resistance of a material changes with a change in temperature. Different materials have different temperature coefficients, with some materials exhibiting a positive temperature coefficient (their resistance increases with temperature) and others exhibiting a negative temperature coefficient (their resistance decreases with temperature).

The temperature coefficient of resistance is an important factor to consider in the design of electrical circuits, as changes in temperature can affect the performance of the circuit. For example, if a circuit is designed using a material with a positive temperature coefficient of resistance, it may become less efficient as the temperature increases, leading to overheating and potential damage to the circuit.

In conclusion, temperature has a significant effect on the resistance of a material, with an increase in temperature resulting in an increase in resistance. This effect is due to the increased collisions between the electrons and atoms within the material, and is measured by the temperature coefficient of resistance.