Resistance is the force, which opposes the flow of an electric current around a circuit so that energy is required to push the charged particles around the circuit. Resistance is measured in ohms. A resistor has the resistance of one ohm if a voltage of one volt is requires to push the current of one amp through it.

Resistance occurs when the electrons travelling along the wire collide with the atoms of the wire.

These collisions slow down the flow of electrons causing resistance. Resistance is a measure of how hard it is to move the electrons through the wire.

Wire length: If the length of the wire is increased then the resistance will also increase as the electrons will have a longer distance to travel and so more collisions will occur. Due to this, the length increase should be directly proportional to the resistance increase.

To measure and record the results for this factor is simple, the results would be collected and could show a connection between the length of the wire and the resistance given by the wire. This is why I have chosen to investigate how resistance changes with length.

45 0.610.370.280.180.17 0.360.200.180.150.14 1.691.851.561.201.23 1.43

50 0.290.150.240.120.11 0.190.090.130.080.07 1.531.671.841.501.57 1.61

that for a certain current (charge flowing at a certain rate), there will be a greater voltage across the wire if it has more resistance.

Some topics in this essay:
Evaluation Analysis, Wires Factors, Line Fit, , Preliminary Method, Resistance Ohms, Experiment Prediction, Safety Handle, Ohms Average, length wire, VOLTS/AMPS Below, crocodile clips, resistance wire, metre rule, power supply, directly proportional, wire length, resistance ohms, main experiment, wire resistance, proportional length wire, length wire resistance, average resistance ohms, directly proportional length, electrons collide atoms,