WAYLIN TO'S GCSE PHYSICS COURSEWORK
Investigation to how length affects the resistance of a wire.
I am going to investigate how length affects the resistance of a wire. There are three main factors which affect the resistance of a wire:
The material of the wire. (What the wire is made out of eg. Copper, nichrome)
The length of the wire.
The thickness of the wire. (The diameter of the wire)
Resistance is a 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. The circuit itself can resist the flow of particles if the wires are either very thin or very long.
e.g. The filament across an electric light bulb.
Resistance is measured in ohms. The symbol for an ohm is ?.A resistor has the resistance of one ohm if a voltage of one volt is required to push a current of one amp through it. To work out the resistance of a wire one must use the formula:
I =current
V=voltage
R=resistance
Resistance is affected by length because if the wire is more longer the electrons have to travel a more longer distance, if there was a 30cm wire and a 60cm wire, the resistance in the 60cm wire would be twice the 30cm wire. Thickness of a wire affects the resistance because if a wire is thin. The electrons will have to squeeze more to get round the circuit with a thicker wire. The material of a wire will also have an affect on resistance, electrons find it easier to go through materials than others.
Investigation to how length affects the resistance of a wire.
I am going to investigate how length affects the resistance of a wire. There are three main factors which affect the resistance of a wire:
The material of the wire. (What the wire is made out of eg. Copper, nichrome)
The length of the wire.
The thickness of the wire. (The diameter of the wire)
Resistance is a 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. The circuit itself can resist the flow of particles if the wires are either very thin or very long.
e.g. The filament across an electric light bulb.
Resistance is measured in ohms. The symbol for an ohm is ?.A resistor has the resistance of one ohm if a voltage of one volt is required to push a current of one amp through it. To work out the resistance of a wire one must use the formula:
I =current
V=voltage
R=resistance
Resistance is affected by length because if the wire is more longer the electrons have to travel a more longer distance, if there was a 30cm wire and a 60cm wire, the resistance in the 60cm wire would be twice the 30cm wire. Thickness of a wire affects the resistance because if a wire is thin. The electrons will have to squeeze more to get round the circuit with a thicker wire. The material of a wire will also have an affect on resistance, electrons find it easier to go through materials than others.