Project cost ($):
1 hour to prepare, 1 hour for the science project experiment
Basic safety requirements
Table of Contents
This science fair project was conducted to find out how temperature affects the conductivity and resistance of a wire. The science project involved a copper wire of diameter 0.5 mm.
As the temperature of a wire increases, the resistance of the wire will also increase and therefore the conductivity of the wire will fall.
Resistance and conductivity
Conductivity, resistance, current, ampere, voltage, volt, ohm
science fair projectThe materials required for this science fair project:
1. For this science fair project, the independent variable is the temperature of the copper wire. The dependent variable is the resistance of the wire. This is determined by measuring the current and resistance of the wire. The constants (control variables) are the room temperature, the applied voltage, the diameter of the wire and the length of the wire.
4. The initial reading shown on the ammeter is recorded in the table below. As the current flows through the electromagnet's wire, the temperature of the wire will increase. This temperature is measured using the infrared thermometer. As the temperature increases 10°C, the ammeter reading is recorded, and the wire is disconnected from the circuit and its resistance is immediately measured using the ohm meter.
5. Procedure 4 is repeated as the temperature of the wire increases every 10°C until the highest temperature is reached.
It is observed that as the temperature of the wire increases, the resistance of the wire also increases but the current flowing in the wire falls.
The graph below represents the results of our science project experiment.
Our hypothesis has been proven to be true. As the temperature of the wire increased, he resistance of the wire increased and its conductivity fell.
What would happen if the science fair project were to be repeated using different wire sizes?
Electrical resistance - http://en.wikipedia.org/wiki/Electrical_resistance