• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11

Find out the relationship between resistance and conductive putty, and to see how length of putty affects this relationship.

Extracts from this document...



The aim of this investigation is to find out the relationship between resistance and conductive putty, and to see how length of putty affects this relationship.

The Experiment:

Conductive putty is specially designed to be a conductor; this is achieved by adding carbon black. This can easily be used to prove the concept of resistivity because it is malleable and so the cross-sectional area, length and shape can easily be changed.

This experiment will show the effects on resistance in a circuit, as the length of putty decreases.

I will be using 30cm of putty, and decreasing it by 5cm each time.

First the voltage of the battery will be taken using a voltmeter, and this will be recorded at the start of the experiment. Then a circuit will be constructed containing the battery, the ammeter and putty. See diagram. For each different length of putty, a reading will be recorded from the ammeter and when the practical has been completed, I will work out the resistance using the formula R=VI. From those results I will draw a graph and then evaluate and conclude my experiment.



My constants include the weight of my putty – I am going to start each experiment with 50g of putty.

...read more.


I have calculated the resistance using the formula: R=V/I. Resistance is measured in ohms and the unit uses the symbol Ω.

Experiment 1 – battery voltage = 6.12V:

Length of putty in cm

Amps in A

Resistance in Ω  



















Experiment 2 – battery voltage = 6.03V:

Length of putty in cm

Amps in A

Resistance in Ω  



















...read more.


If this experiment was going to be redone, then I think I might use a new battery for each experiment, and record the voltage as constant for all experiments. Also I would maybe use a different method to connect the wires to the putty, like maybe sticking the wires directly and vertically into the ends of the putty. Another thing to do would be to use temperature or even cross-sectional area as a variable alongside length, and to do a series of experiments involving increasing the length while decreasing the cross-sectional area, and vice versa.


I think this experiment was a success in that it proved the theory that resistance is lower with shorter lengths of conductor and my hypothesis declares that as the electrons have a shorter distance to travel if the length is shorter, there are fewer collisions and less energy is lost to heat unlike in a longer length of conductor, so the putty will have lower resistance. Therefore my hypothesis was correct and I have successfully concluded my experiment proving that resistance is directly proportional to the length of conductor.

...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

    An Investigation To See How Resistance Can Be Changed By Variables.

    4 star(s)

    of wire, and the average of the results that it needed in order to be worked out. With this data I plotted a graph, it was straight and has a best line going almost all trough the points. The prediction estimated that the data would produce a straight line on the graph and would be the same gradient.

  2. Marked by a teacher

    An Investigation Into The Resistance Of Conductive Putty

    3 star(s)

    What factors I am going to keep the same In the experiment I am going to keep a few things the same such as the diameter of the putty, the amount of cells and all of the safety procedures. Repeats of the experiment I plan to make a repeat the

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

    Ammeter and voltmeter readings: The ammeter and voltmeter readings were fluctuating, so it is doubtful if they are accurate. This could also mean that the motor alters the amount of current it draws as it lifts its load. This means that a reading taken at one given point will

  2. To investigate how the length (mm) and the cross-sectional (mm2) area of a wire ...

    I believe that the following set of equipment will enable me to obtain the most accurate and reliable results: * A rheostat * An ammeter * A voltmeter * Insulated electrical wires * Wires composed of the following substances: o Gold o Silver o Copper o Nichrome o Aluminium o

  1. An experiment to find the resistivity of nichrome

    In fact, the electromotive force V (measured in volts) across a circuit divided by the current I (amperes) through that circuit defines quantitatively the amount of electrical resistance R. Precisely, R = V/I. Thus, if a 12-volt battery steadily drives a 2-ampere current through a length of wire, the wire has a resistance of 6 volts per ampere, or 6 ohms.

  2. Conducting Putty

    I am observing the length of the putty as Variables to keep constant: * Shape of the putty * Area and thickness of the ends of the putty * Temperature of the putty and surroundings Prediction: I predict that the longer the wire, the more resistance there will be.

  1. Investigation to see the relationship between actual and theoretical energy released when burning different ...

    We tested to see weather the size of the wick made a difference, and decided that it should be as small as possible so she flame is smaller. We decided that 1cm worked well. We started off by using a time of 4 minutes for each test and found this

  2. Resistance of Carbon Putty.

    I used a power pack set on two volts connected the putty as shown in the diagram, varied the length from 10.5 to 11.5 cm keeping the diameter constant at 2.2 cm. I used the ammeter setting of a multimeter to measure the potential differences passing through the conductive putty.

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