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

IB Physics HL - Relationship between thickness and Resistance of a wire

Extracts from this document...


IB Physics HL - Relationship between thickness and Resistance of a wire Aim To investigate the relationship between thickness and Resistance of a wire Hypothesis When the wire is getting thicker, there are more routs for electrons flow that means increases of ampere. Resistance is inversely proportional with ampere. Therefore, I think the resistance is inversely proportional with thickness of a wire. Variables Independence: Thickness of a wire Dependence: Resistance of a wire Controlled variables: length of a wire, type of a wire, and voltage from power supply Method Set the voltage from power supply to 6V Set the length of a wire to 40cm. ...read more.


SWG Diameter (mm) 1 2 3 Av 1 2 3 Av 18 1.219 5.84 5.83 5.84 5.84 2.5 2.49 2.48 2.49 0.43 20 0.914 3.93 3.92 3.92 3.92 2.95 2.97 2.98 2.97 0.76 24 0.559 1.82 1.83 1.82 1.82 3.4 3.41 3.42 3.41 1.87 26 0.457 1.22 1.21 1.22 1.22 3.66 3.67 3.65 3.66 3.01 32 0.274 0.53 0.52 0.53 0.53 3.84 3.82 3.83 3.83 7.27 36 0.193 0.24 0.24 0.24 0.24 3.9 3.91 3.93 3.91 16.31 38 0.152 0.14 0.15 0.15 0.15 3.98 4 3.99 3.99 27.20 Conclusion As you can see in the graph, when the diameter of a wire is getting smaller which means a wire is getting thinner, the resistance goes up. ...read more.


However, one thing I just want to mention is, when we deal with 18 SWG and 20SWG wire, the wire gets really hot even we could smell something burning. Although we set the length of a wire to 40cm, it wasn't enough for thick wire such as 18 SWG and 20SWG wire. Another small problem was the wires weren't straight. So the length of a wire might be inaccurate, it could be effects to get an accurate value for resistance of wire. Especially, thick wire was really hard to make it straight. Suggestions Solution for first problem is, do the experiment in the water, because water can remain cool. But it seems to be a dangerous. Solution for second problem is, use the hammer, this solution seem to be useful for only thick wire. ?? ?? ?? ?? ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate 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 International Baccalaureate Physics essays

  1. Marked by a teacher

    Experiment to calculate the diameter of a piece of nichrome wire from its electrical ...

    3 star(s)

    186.5 �0.5 10.6 10.5 10.4 10.6 10.5 Sample calculations: Sample calculation 1. Calculating the length and uncertainty of Nichrome wire using error propagation: The length of one knob to the opposite knob (1 fold) was measured, shown in fig 1 above.

  2. Investigating Wires

    If the resistance becomes too low, there is an excessive flow of current which causes the wire to melt from the excess heat. Therefore time affects the resistance per unit length, and so it was kept constant.

  1. Nuclaer Physics

    which is A MEASURE OF DECAYS PER SECOND. * Therefore 100Bq means that 100 atoms decay every second. * Some substances are chosen for their short half life (in the body, medical purposes), decay quickly and give out radiation but don't last long.

  2. HL Physics Revision Notes

    In other words, the total kinetic energy of the objects is the same before and after the collision. An inelastic collision is where mechanical energy is lost. Almost always in reality collisions are inelastic as energy is lost as sound and friction.

  1. Determining the diameter of a piece of Nichrome wire by determining its resistivity

    Length / l (cm) R (â¦) (Trial 2) ±0.1⦠R (â¦) (Trial 2) ±0.1⦠R (â¦) (Trial 3) ±0.1⦠R (â¦) (Trial 4) ±0.1⦠R (â¦) (Trial 5) ±0.1⦠1 38.3 ± 0.1 2.6 2.7 2.6 2.4 2.5 2 75.6 ± 0.2 4.5 4.3 4.6 4.5 4.5 3 112.9 ±

  2. How does the sinkage depth of a tyre affect its rolling resistance ?

    (Silliman. 1891) The bicycle has tires made out of rubber i.e. the bicycle has pneumatic tires. The primary cause of rolling resistance in the pneumatic is hysteresis . Hysteresis is a property that is unique to all the elastic products in which energy is lost during the recovery of the elastic from the stress it is put under.

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