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

Practical Assessment for Physics: Investigating the Resistance of Conducting Putty.

Extracts from this document...

Introduction

Practical Assessment for Physics: Investigating the Resistance of Conducting Putty Possible Variables: Thickness, Length, Temperature. Variable to be investigated: Length as it is the most reliable way of creating a fair test. Aim: To see how the variable lengths of the conducting putty will affect the resistants in the circuit. Prediction: I predict an increase in the length of the putty will increase the resistants in the circuit. This is because there is a bigger area for the charges to travel through, with less chance of a collision. I came to this conclusion of my prediction by collecting evidence from an 'AS/A2 Physics' book by Wendy Brown. ...read more.

Middle

(3) I then placed the tip of the copper on each ends of the 1cm putty coil as shown in my diagram. As I was doing this I recorded the voltage reading into a table and disconnected the copper from the putty. I repeated this ten times and collected ten voltage readings for this length of putty. But between each reading I waited for a few seconds so that the temperature would be the same at each reading making it a fair test. I then did exactly the same for recording the results form the amp meter. (4) I repeated stage (3) for the other lengths of putty to have all the readings in my results table. ...read more.

Conclusion

5.63 8 4.36 4.65 5.13 5.36 5.57 9 4.25 4.73 5.06 5.35 5.65 10 4.29 4.70 5.09 5.36 5.62 AVERAGE 4.315 4.725 5.084 5.349 5.596 CURRENT READING Reading No. 1cm 3cm 5cm 7cm 9cm 1 0.44 0.24 0.18 0.13 0.11 2 0.39 0.25 0.17 0.11 0.09 3 0.42 0.23 0.19 0.11 0.10 4 0.43 0.28 0.20 0.14 0.11 5 0.44 0.25 0.22 0.13 0.11 6 0.40 0.27 0.17 0.14 0.10 7 0.41 0.28 0.19 0.12 0.09 8 0.44 0.26 0.21 0.14 0.10 9 0.43 0.24 0.16 0.13 0.11 10 0.44 0.27 0.19 0.14 0.09 AVERAGE 0.424 0.257 0.188 0.129 0.101 RESISTANTS (VOLTAGE AVERAGE DIVIDED BY CURRENT AVERAGE) 1cm 3cm 5cm 7cm 9cm 10.1769 18.3852 27.0426 41.4651 55.4059 Conclusion: Sohail Deen 11H 29/01/03 1/4 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Electrical & Thermal Physics 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 AS and A Level Electrical & Thermal Physics essays

  1. Does the length of a conduction putty affect its resistance?

    digital multi-meters - I chose to use Digital multi-meters over Moving coil meters, as they are less accurate; Digital multi-meters play their readings to an accuracy of 0.01 Volts, plus or minus 0.005 Volts, whilst Moving coil meters display their readings to only 0.1 Volts, plus or minus 0.05 Volts.

  2. Investigating how temperature affects the resistance in a wire

    If I use the formula of R = V / I to produce the approximate ampages during the experiment, and plot a graph of ampage against the temperature (see graph 7). And then, project the line of best fit till it reaches the x-axis or y = 0, I can

  1. Investigating the factors affecting the size of current flowing through a length of resistivity ...

    approximately halves the current. This too supports my prediction. 2) CROSS-SECTIONAL AREA EXPERIMENT I predict that doubling the cross-sectional area of the resistance putty will double the amount of current passing through the putty, provided all other factors such as the voltage across the putty remain the same.

  2. Coursework To Find The Internal Resistance Of A PowerSupply

    I will now use a shorter rheostat so to give me a greater change in current as the bow connector is moved along the metal rail slightly. I am also going to increase the range of the results gathered and I will record the voltage and current readings at eight

  1. To investigate the factors which may affect the resistance of resistance putty.

    both values increase at the same rate.) I also think that even though there is no length of resistance putty in the circuit, there could still be some resistance. This is because connecting wires can carry some resistance in a circuit.

  2. The aim of this investigation is to find out if the length of an ...

    = Resistivity (? -m) x --------------------------------- (Equation 2) Cross-sectional area (m2) We plan to carry out our investigation using two methods: Method 1 Our first method involves the use of Equation 1. We shall make use of the fact that for a fixed voltage, the amount of current (electrons)

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