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

An experiment to find how the length of a wire affects the resistance.

Extracts from this document...

Introduction

An experiment to find how the length of a wire affects the resistance

Aim

In this experiment I am going to find how the length of a wire may affects the resistance and voltage.

Processes

I will consider the connection between the length of wire and the electrical resistance being given off. I will change the length of the wire, but I am going to try to keep temperature and the diameter constant the same. The voltage and current will have to be steady before I attempt to work out the resistance.

Method

I will set up a circuit that is very similar to the diagram below. I will take the battery and connect it to the amp meter. This will measure the amperage/current in the wire. Next, I will join the length of constantan wire the circuit; this can be changed as I go through the experiment. I will then add a voltmeter parallel to the length of wire. This will measure the voltage through the wire.

...read more.

Middle

2.95

40

0.74

3.7

0.73

3.65

0.73

3.65

50

0.86

4.3

0.88

4.4

0.94

4.7

60

1.1

5.5

1.06

5.3

1.1

5.5

70

1.23

6.15

1.22

6.1

1.29

6.45

80

1.37

6.85

1.47

7.35

1.46

7.3

90

1.59

7.95

1.58

7.9

1.56

7.8

100

1.8

9

1.73

8.65

1.8

9

Experiment 4

Experiment 5

Length of constantan wire (cm)

Voltage (v)

Resistance (ohms)

...read more.

Conclusion

Improvements

If I were to do the experiment again, I could make some improvements to make the level of accuracy better.  For example, I could make sure that the joints/connections were jointed properly and would have to make sure I use the same equipment every time. I could also get a machine to measure the length of the constantan wire and do it in a larger team. I could also try to do the experiment several more times. This would improve my accuracy greatly; also I would check the wire and make sure it is perfect because this would affect amount of collisions.

Further work

If I was to do this experiment a different way I would simply change on of the key points I have listed above.

...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. Marked by a teacher

    Investigate young's modulus behind Constantan and Copper.

    4 star(s)

    It is therefore mixed with other metals and melted. When carrying out this experiment I deem that as the number of weights is increased for copper, this will slowly exert pressure and the molecules will slowly pull apart as the bond will break between the molecules.

  2. To find out what happens to the efficiency of a motor as I change ...

    Obtain more results: By this I do not just mean testing weights higher than 1.0N and lower than 0.1N. We could obtain efficiency values for weights incrementing by 0.05. This would allow me to determine a better trend, and draw a more accurate line of best fit.

  1. Investigating how the length of a Wire affects its resistance.

    Resistance (Repeat 1) (In Ohms) Resistance (Repeat 2) (In Ohms) Resistance (Repeat 3) (In Ohms) 10 0.44 0.40 0.44 20 0.76 0.72 0.72 30 1.00 1.04 1.04 40 1.36 0.80 (1.32) 1.32 50 1.64 1.72 1.68 60 2.04 2.00 2.00 70 2.32 2.32 2.40 80 2.60 2.60 2.60 90 2.92 2.96 2.92 100 3.28 3.64 3.32 Length of Wire (cm)

  2. Free essay

    Aim: the aim for this experiment is to check if the length of a ...

    * The voltage of the wire - as shown on the volt meter for various distances * Current in the circuit - this will be shown on the ammeter to keep this stable I am going to use a variable resistor.

  1. To find out what variable affects the resistance of a wire.

    and the resistance will not be as accurate as if an ohmmeter were used. The ohmmeter can measure the resistance to the nearest .1 ? so it is very accurate. Metre ruler - This is used to measure the length of wire, it is quite accurate as it can be

  2. Free essay

    Investigation: How length affects the resistance in a wire.

    The graph also appears to be very linear, this highlights the fact that the results they are very equally spaced. From these observations made, I can safely say that increasing length of wire is directly proportional to the increase of resistance.

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