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

Joules law

Extracts from this document...

Introduction

Aysweria Naathan IB HL Physics Y2 04-November-2007 Joule's Law Aim: To determine the accuracy of Joule's law in determining the resistance of a circuit. Data Collection: Time (s 0.1)* Energy (mili-joules0.05) Energy (joules0.00005) 0 0 0 5 1.15 0.00115 10 2.33 0.00233 15 3.35 0.00335 20 4.37 0.00437 25 5.41 0.00541 30 6.43 0.00643 35 7.47 0.00747 40 8.48 0.00848 45 9.53 0.00953 50 10.59 0.01059 55 11.59 0.01159 60 12.53 0.01253 * Data collected with video analysis Data Analysis: Calculated Resistance (R) ...read more.

Middle

The calculated resistance is almost twice the magnitude of the stated resistance. One major random error is that the copper wires are not perfect conductors thus resistance is higher than the stated. Moreover, the copper wire might have oxidized to form CuO which is a good insulator in its solid state. A human error is that I may have torn some of the copper rods inside the wire as I had done in another set up. ...read more.

Conclusion

Another major random error is that Energy measuring machine is not resistance free. Thus it too adds to the error. We should find the resistance of the machine prior to the experiment and subtract it out from the total. Lastly, a less major error is that we assumed that the variable resistance has a resistance of exactly 47000 ohms. The resistance may well be 47000 ohms but it is likely to be a off. Thus I suggest that the experiment is repeated with different instrument but at the same settings to either support or contradict this result. ...read more.

The above preview is unformatted text

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. Ohms Law.

    Due to this, the length increase should be directly proportional to the resistance increase. To measure and record the results for this factor is simple, the results would be collected and could show a connection between the length of the wire and the resistance given by the wire.

  2. Ohm's law.

    Accuracy I am intending to also get a reading for the length "zero" also using the crocodile clips and keeping the circuit identical. This shall be my "control". I suspect that there will be resistance both in the circuit wires and in the multimeters.

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