# Temperature and Resistance

Hard
Temperature has an effect on the resistance of a wire. As the temperature increases, the resistance of the wire increases and the conductivity of the wire decreases. This can be measured by using an ohm meter and an ammeter to measure the current and resistance of the wire.

## Hypothesis

The hypothesis is that as the temperature of a wire increases, the resistance of the wire will also increase and therefore the conductivity of the wire will fall.

## Method & Materials

You will wind a 5-meter wire around a PVC pipe, measure the resistance of the wire, connect the wire to a circuit with 3 batteries, measure the current and resistance of the wire as the temperature increases, and disconnect the wire from the circuit.
You will need 5 meters of varnish insulated copper wire, a PVC pipe, three 1.5V batteries, 3 jumper wires, an ohm meter, an ammeter, a paper cutter, an infrared thermometer, and insulation tape.

## Results

The results of the experiment showed that as the temperature of the wire increased, the resistance of the wire also increased but the current flowing in the wire fell. This proved the hypothesis to be true.

## Why do this project?

This science project is interesting because it shows how temperature affects the resistance of a wire and how it affects the flow of electricity.

## Also Consider

Experiment variations to consider include repeating the experiment using different wire sizes and using aluminum wire instead.

## Full project details

You can find additional information and details for this science fair project here. Have fun exploring!