An investigation into the factors affecting the resistance of a wire

An investigation into the factors affecting the resistance of a wire

The filament across an electric light bulb. This experiment does not measure resistance directly, but rather uses ammeter readings. Check with printed cross sectional areas on wires. This happens across the length of a wire and the electricity is conducted The crocodile clips are connected on either end of the graphite rod. I will try to make this investigation as accurate as possible. I am not doing temperature because it would be hard to get results from and I think they wouldn't be as accurate The equipment used for experiment was also kept constant, as was the environment for the experiment. Discuss this with your class and teacher. I have decided to test length of wire at, 10cm, 30cm, 50cm, 70cm, 90cm, cm, cm, cm and cm keeping a constant cross sectional area of 0. Some of the energy is also transferred as light to the surroundings and the wire glows.

I will be looking at resistances affected by the length of wire. Use crocodile clips to connect each conductor to the circuit, as shown below.

Resistance of conductor formula

This is because if you double the length of the wire you will double resistance, because the electrons just have twice as much material to pass through. A diode is an electrical component that has a very low resistance to current flow in one direction, and high resistance in the other direction. However, due to my line of enquiry, I will only change the length of the wire. Resistance is the slow-down of the flow of an electric current around a circuit so that energy is required to push the charged particles around the circuit. Hypothesis and Scientific Knowledge When electric current passes through a conductor, there is always a resistance against it. The bar graph will have ammeter readings current on the y-axis. In addition, I will make sure I turn the power pack off after each reading. The resistance varies between different types of materials. Resistors can be extremely useful. To support my prediction and conclusion, I could do further experiments.

This law is valid for most coductors. I will switch off the power pack, move the crocodile clip that was at 5cm up to 10cm, and switch on the power pack.

how does the length of a wire affect resistance

The crocodile clips are connected on either end of the graphite rod. Why does the element glow? Graph Graphing these results shows a nearly straight line, illustrating a strong positive correlation between length and resistance, which is consistent with my prediction.

what causes resistance in a conductor

Variables that I am going The first electric light was made in by a man called Humphry Davy. The input energy enters the system and then provides an output energy. A diode is an electrical component that has a very low resistance to current flow in one direction, and high resistance in the other direction.

resistance of a wire experiment risk assessment

Also displays average resistance of each circuit.

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An experiment to investigate the factors which affect the resistance in a wire.