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

In this investigation I am trying to find out whether adjusting the length of a wire affects its resistance.

Extracts from this document...

Introduction

Chris Mawson        Science Coursework        -  -

Science Coursework

Plan

In this investigation I am trying to find out whether adjusting the length of a wire affects its resistance.

I predict that as I increase the length of the wire the resistance of the wire will increase proportionately. For example if I were to increase the length of the wire by the same amount each time I would expect the resistance to increase by the same amount also. I believe this will happen due to the how the electrons, which make up the current, act inside the wire. When the wire is made longer, the chance of collision for the electrons is greater. This is because there are more obstacles for them to pass through. The increased amount of collisions causes kinetic and heat energy. The kinetic energy is let off vibrations in the wire while the heat energy makes the wire increase in heat.

...read more.

Middle

50cm

2.2

2.3

2.2

2.23

60cm

2.5

2.5

2.6

2.53

70cm

2.7

2.7

2.8

2.73

80cm

3

2.9

3

2.96

90cm

3.3

3.2

3.4

3.3

100cm

3.6

3.5

3.7

3.6

Ohms Law

Length of wire

Volts

Current

Ohms

10cm

1

1

1

20cm

1.2

0.9

1.35

30cm

1.3

0.8

1.63

40cm

1.4

0.7

2

50cm

1.4

0.6

2.3

...read more.

Conclusion

Evaluation

I believe that the inaccuracy of some of my results was due to a mixture of human error and poor equipment conditions. The wire was consistent enough to maintain an equal amount of resistance for every 10cm of length added. However the incorrect results I think were due to possible added resistance from elsewhere, for example the crocodile clips or the multi meter itself. If I were to do the experiment again I would first set up a pre experiment test, using the same equipment and to see if the positioning of the crocodile clips has any effect on the results. I would expect the optimal place would be on the outside of the lengths. I would also make sure that my measurements are all accurate and precise so that I can hold no blame and the only problem would be the equipment.

...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. Find whether the length of a wire affects its resistance.

    The more frequent the collisions, the greater the resistance. Increasing the temperature of a metal causes an increase in the energy and amplitude of the vibrations of the metal particles. This results in more frequent collisions between the electrons and the metal particles, hence the increase in resistance.

  2. Physics Coursework Gravity Investigation

    Using this average bounce height, an average efficiency was calculated for each of the five release heights. 9. A graph was finally drawn with a trend line, displaying my results of this investigation, i.e. the efficiency of the bounce of a golf ball at different release heights.

  1. Resistance Coursework

    I also found out that the resistance of one amp carries a current of one amp if there is a potential difference of one volt across it. Judging from my results, I can safely say that the majority of my prediction was right.

  2. See whether the length of a wire affects its resistance.

    slid my rheostat halfway then once again recorded the reading then repeated with the rheostat on full after this I turned off the power then repeated these 3 steps 6 more times up to 70 cm. once I had done the experiment 3 times with all of my recorded results,

  1. Investigation to determine whether the resistance of a wire increases in proportion to its ...

    As the length increases so does the vibration. These increased vibrations make it more difficult for the electrons to flow through, and this causes resistance. Variables: There are several variables in this experiment they can be sub divided into three different groups of variables: Independent, Dependant and Control: Dependant: * This will be the resistance of the Nichrome wire as the length of it is changed.

  2. Ohms Law.

    constant, The equipment should be kept the same, The edge of the crocodile clips should be at the edges measured length. The Variable factor The factor that I am going to vary is the length of the E26 wire. Circuit diagram Method The circuit was set up as shown above.

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