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

Identify the factors that affect the resistance of a wire and investigate one of the factors that affect the resistance of a wire in detail to find a more definite link.

Extracts from this document...

Introduction

Coursework Assessment 1                                                       Rhiannon Smyth

Identify the factors that affect the resistance of a wire and investigate one of the factors that affect the resistance of a wire in detail to fin a more definite link.

I am going to identify the factors that affect the resistance of a wire and investigate one of the factors that affect the resistance of a wire in detail to find a more definite link.

Factors that affect my investigation are called variables; these are the thickness of the wire, length of the wire, temperature, material and size of current.

In my experiment my independent variable is the length of wire and the dependent variable is the resistance of the wire.

The thickness of the wire, temperature, material and the voltage across are the controlled variables in my experiment.

I predict that as I increase the length of the wire, the resistance will also increase.

An electric current is when electrons are free and can flow along the wire from negative to positive.

...read more.

Middle

0.033

60

0.033

70

0.037

80

0.039

From these experiments it can be seen that as you increase the temperature, the resistance decrease and as you increase the length of wire the resistance also increases.

Apparatus for the main experiment:

In this experiment the only main risk is that the wire could get hot and you could burn yourself, so you should take care and do the experiment as quickly as possible.

Here is my method for the main experiment:

Collect the apparatus shown in the diagram.

Place the wires 10cm apart and take a reading and record your results in a table.

Repeat this at: 10cm, 20cm, 30cm, 40cm, 50cm, 60cm, 70cm, 80cm and 90cm and record your results.

Once you have all the results, go back down from 90cm to 10cm and record the results.

...read more.

Conclusion

Evaluating the conclusion

My conclusion stated that ‘from looking at my graph and results, it can be seen that as I increased the length of wire, the resistance also increased. The length is directly proportional to the resistance, because a straight line goes through the origin.’ I think that my conclusion is valid because my results are reliable. My graph I have drawn has a line of best fit and all of the points are very close to it.

The aim of my investigation was to identify the factors that affect the resistance of a wire in detail to find a more definite link. Here is a plan that could improve the accuracy and reliability of my results:

Collect the apparatus shown in the diagram.

Also collect a razor blade.

Place the wires 10cm apart using the blade and take a reading and record your results in a table.

Repeat this at: 10cm, 15cm, 20cm, 25cm, 30cm, 35cm, 40cm, 45cm, 50cm, 55cm, 60cm, 65cm, 70cm, 75cm, 80cm, 85cm and 90cm and record your results.

Once you have all the results, go back down from 90cm to 10cm and record the results.

Then calculate the average and plot a graph using your averages.

Draw a line of best fit on your graph.

Clear away all apparatus.

...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

    Resistance Aim: my main aim is to investigate the factors that affect the resistance ...

    3 star(s)

    Parallel Circuit Parallel Circuit have two advantages when compared with Series circuit. The first advantage of Parallel Circuit is that a failure of one component does not lead to the failure of the other components. This is because a Parallel Circuit consists of more than one loop and has to

  2. An in Investigation into the Resistance of a Wire.

    Current (A) Resistance V/I (?) 0.029 0.015 1.933 0.072 0.037 1.946 0.089 0.046 1.935 0.122 0.063 1.937 0.134 0.069 1.942 0.150 0.077 1.948 0.198 0.102 1.941 0.218 0.112 1.946 0.239 0.123 1.943 0.270 0.139 1.942 Total 1.941 E32 wire with the length at 30cm Voltage (V)

  1. How Does the Shape of a Resistance Wire affect its resistance?

    I will use a ruler, which measures in millimetres when measuring the length of my wire. I will also use an ammeter that measures in 0.01A for experiment 1 and an ammeter that measures in 0.1A for experiment 2 because, from my preliminary work, I have found out that these

  2. Investigation of the factors that affect the resistance of a wire.

    This causes more collisions between the electrons and the ions, as they will be moving into the path of the electrons more frequently. When the electrons collide with the ions they lose some of their kinetic energy in the form of heat energy and this causes them to move more slowly thus making the current intensity in the wire decrease.

  1. Investigating The Factors Which Affect The Resistance In A Wire

    Nickel Power Pack Length (cm) Voltage Current Resistance 4 10 1.34 2.99 0.45 4 20 1.91 2.14 0.89 4 30 2.08 1.59 1.31 4 40 2.18 1.24 1.76 Copper Power Pack Length (cm) Voltage Current Resistance 4 10 0.25 8.06 0.03 4 20 0.36 8.08 0.04 4 30 0.56 7.78

  2. Length vs Resistance

    This is because in my preliminary work, I have found that this voltage does not cause the current to increase above 1A. This is important since an increase above 1A because the temperature of the wire increasing may cause it to melt or break.

  1. Factors which affect the resistance of a wire

    I will use a voltmeter to measure the voltage and an ammeter to measure the current. The voltmeter will be connected in parallel in order for it to work and the ammeter will be connected in series. This is a diagram of my circuit: I will also make a list

  2. What factors affect the resistance of a wire?

    This means that the thickness is inversely proportional to resistance so if you double the thickness, you cut the resistance in half. - Temperature of wire: When current passes through a metal the electrons in the metal are trying to get past the protons.

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