• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

To investigate the factors that affects the resistance of metal wires.

Extracts from this document...

Introduction

Resistance of a wire

Aim

To investigate the factors that affects the resistance of metal wires.

Introduction

Resistance is a force that 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. 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. The resistance is measured in ohms (   ). Resistances is important in an electric circuit, as,

Preliminary Experiment

  In this experiment, I am working out whether length

...read more.

Middle

How it is controlled.

The length of the wire

This will be the only thing in the experiment I will change. I will measure it on a metre ruler.

The diameter of wire

I will use the same piece of wire the whole way through the experiment so it will stay the same.

The current

The current needs to stay the throughout the experiment. I will measure this with an ammeter and I will also use a resistor to make sure the amp can stay as close to each other as possible.

The heat of the wire

It will be hard to keep this the same but I

...read more.

Conclusion

The length of the wire will make a difference to the resistance. This is because when you have a long wire, the electrons have to squeeze together for longer to be able to pass through the wire than they do in order to be able to pass through a short wire. I predict that the longer the wire, the greater the resistance. For example, if I had a 30 cm wire and a 60 cm wire, the 60 cm wire would have a resistance twice that of the 30 cm wire. The more the electrons bump together, the higher the resistance

...read more.

This student written piece of work is one of many that can be found in our GCSE Electricity and Magnetism section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Electricity and Magnetism essays

  1. Peer reviewed

    Investigation in resistance in wires

    5 star(s)

    Conclusion NOTE: Data points 1v, 0.11A & 1.5v, 0.15A = Orange outlier and regular red. 4v, 2.9A = Pink outlier, regular blue. 4.5v, 3.3A = Pink outlier, regular blue and yellow. 5v, 0.36A = Pink outlier, regular yellow. Towards the of the graph the range bars overlap, and the last

  2. Resistance and Wires

    � 0.56 (amps) = 1.7(ohms). These tests were done using a 1m length of wire with a diameter of 34mm. I chose to use 10v of voltage because it gave the clearer results than a lower voltage because the numbers where higher.

  1. Investigate one or more factors affecting the resistance of metal wires

    wire is made and the temperature of the wire constant during this investigation. I have found that it is difficult to keep the temperature of the wire constant during the investigation since the wire is bound to heat up as described above.

  2. Conductors and Insulators.

    A circular magnetic field develops around the wire, as shown by the circular lines in the illustration below. The field weakens as you move away from the wire (so the lines are farther apart as they get farther from the wire).

  1. To investigate the factors which effect the resistance of a metal wire.

    because of the higher number of electrons .If the atoms in the wire are closely packed, then this will cause an increase in resistance, due to frequent collisions. To do this I would use the same length and width of many different wire materials, using the same amount of voltage each time.

  2. Resistance of wires

    If the wire is too narrow, it also tends to heat up, as friction builds because of so many electrons rushing though a narrow tunnel all at the same time. In this case, the resistance of a wire is inversely proportional to cross sectional width, because when the cross section is doubled, the resistance is halved.

  1. Resistance of Wires

    and 0.91 mm (20 swg - the thickest wire). I varied these wire lengths to obtain two sets of results from each wire: 29 cm (the largest length) and 5 cm (the shortest length). These two extremes in wire thickness made sure that I could make a decision on what

  2. Investigating Resistance– To investigate if and how a wires length affects the resistance.

    constant over a wide range of voltages, the material is said to be an "ohmic" material. If the material can be characterized by such a resistance, then the current can be predicted from the relationship: ADVANCED RESEARCH: Microscopic View of Ohm's Law When electric current in a material is proportional

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work