• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3

# To investigate how the thickness and length of the wire in a circuit effects the flow of electrons through a circuit

Extracts from this document...

Introduction

George Clarke                                                                                                  28-04-07

Physics Coursework

Aim:To investigate how the thickness and length of the wire in a circuit effects the flow of electrons through a circuit.

The variable, which I am changing, is resistance.  I am going to do this by changing the length and thickness of the wire.  I will control this variable by using the same kind of wire.  I will also use the same wire board, micrometer, cables and crocodile clips.  I will also not heat the cable, as this will decrease resistance.

Prediction: I think that as the length of the wire increases so to will the resistance of it. I also believe that the rate at which the resistance of the wire increases will be directly proportional to the length.

Reason: with electricity, the property that transforms electrical energy into heat energy, in opposing electrical current, is resistance. A property of the atoms of all conductors is that they have free electrons in the outer shell of their structure.

As a result of the structure of all conductive atoms, the outer electrons are able to move about freely even in a solid.

Middle

4.1

4.1

10.6

10.6

50

2.5

2.5

5.1

5.1

13.2

13.2

60

3.0

3.0

6.1

6.1

15.8

15.9

70

3.5

3.5

7.0

7.0

18.9

18.4

80

4.0

4.4

9.0

8.9

23.9

23.9

90

4.4

4.4

9.0

8.9

23.9

23.9

100

4.8

4.9

10.0

10.0

26.2

26.2

Area of wire:

Area of each thickness:

We recorded the three different wires’ diameters using a micrometer.

Thick =0.55mm

Medium=0.35mm

Thin=0.22mm

To get the area of the cross section we used the equation

The areas of the cross-sections were;

Thick=               0.2375mm

Medium=               0.096mm

Thin=                      0.038mm

To then get the total area we

Conclusion

I do not think that doing any more results in our experiment would have made it any more accurate. I feel that the only way to make it more accurate would be to use a different method – perhaps were we had a bar that did not bend in place of the wire. We could even use a rheostat in place of the wire, because it is essentially a long coiled wire that is connected at different lengths to change the resistance of the circuit

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

# Related GCSE Electricity and Magnetism essays

1. ## Investigating The Effect Of Resistance On A Capacitor Circuit

Safety: During the experiment, I had to take safety precautions. As we were working with crocodile clips, which have very sharp edges, I had to ensure that I was very careful to avoid injuring myself and class members. Also, with the resistors becoming increasingly hot, I had to ensure that

2. ## Physical - Circuit

using constantan because they allows more current to pass through in time, therefore can transfer more energy. Hypothesis: It is likely to be seen that because the greater of diameter, the more the charge could be flow by time, there were larger space to allow charge to pass through.

1. ## Find out what effect changing the length and thickness of wire has on resistance.

A thicker wire will have less resistance because the electrons have more space to flow and therefore will not collide with their neighbouring electrons. This will mean that the wire will stay cooler and also the electrons will not lose as much energy.

2. ## Investigating Resistance in an electrical circuit

Prediction I predict that there will be higher resistance in wires that are longer in length because the path the electrons have to go through is longer. I also believe that as the length doubles the resistance will also double.

1. ## How The Thickness Of A Wire Effects The Wires Resistance.

So if the width is doubled the resistance should also double. This is because if the width is doubled the number of atoms will also double meaning there is twice the number of collisions slowing the electrons down and increasing the resistance.

2. ## To investigate how the length of a wire effects the resistance of it.

The units of volts are equal to joules per coulomb. So ohms law tells us that the more resistance means that there is more energy used up to whilst passing through the wire. Resistance is a measure of how much energy needed to push a current through something.

1. ## The effects on resistance with the variables of length and thickness.

Ohm SI unit (?) of electrical resistant that restricts the flow of electrons through it and is worked out by the V=IR rule meaning Resistance= Voltage Information from Hutchison Encyclopaedia, Physics for You and GCSE Bitesize-Physics. Method: > Set the circuit as shown above, the ammeter in series and the voltmeter in parallel.

2. ## We are investigating whether or not the length of a piece of Nicrome wire, ...

CLIPS 2 We connect the circuit to the Nicrome wires with these METHOD: We collect all of the equipment, which is in the list above, and assemble it in as it is shown below: We then pass a 4, 5, 6 and 8 volts from the power pack through the entire circuit.

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