• 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

# Find out how the length of wire in a circuit affects the resistance.

Extracts from this document...

Introduction

Aim

To find out how the length of wire in a circuit affects the resistance.

Equipment

8  x Flying Leads

2  x 1.5V Batteries

1  x Meter Measuring Board

1  x Ammeter

10 x different lengths of copper

1  x Volt Meter

1  x Crocodile Clip

Diagram

Method

*Gather the apparatus needed for the experiment

*We set up the apparatus as shown on the diagram by doing the following

*Attach the first piece of copper wire to the measuring board.

*Attach one flying lead from the batteries to the ammeter.

*Attach another flying lead from the ammeter to the measuring board.

*Use the length of wire needed by connecting this to one side of the

Measuring board and then connect a crocodile clip to the other side of

the wire.

Middle

*Do this three times for each size of copper wire to make it a fair test.

*Repeat this test but change the length of copper wire by 10cm each time

until you reach one meter.

*To work out the resistance for each size of copper wire, use the equation

Resistance = voltage (pd) / Current (amps)

In 1826, George Ohm discovered that; the current flowing through a metal wire is proportional to the potential difference across it.

(Providing the temperature remains constant)

Fair Test

To make my experiment a fair test, I collected the results for the experiment three times, only changing one variable. By doing this, I will end up with more accurate results.

Safety

• Do not drink or eat in the experiment area.
• Be careful with the copper wire because it may be hot and could burn you.

Prediction

Conclusion

I think that test two and three had acceptable results but test one had unusual results compared to them. The reason for this may be that we used too many flying leads, resulting in an increase of resistance or the piece of wire may not have been connected properly. The room temperature may also have been a cause of this.

I believe that the method I produced is appropriate for this experiment because it gave me accurate results.

I could improve this experiment if I had more accurate equipment which would improve my results greatly.

A relevant experiment that would work well with the one I have just done would be to test if other types of metal wire that also conduct, affect the resistance in them.

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 how the length of a Wire affects its resistance.

This means that there were enough results to draw a valid conclusion from as no more were really needed. The results have a wide range. Considering the space in the lab, it would not be feasible to have 20 or so groups doing experiments with 2m of wire, 1m would be the most that could be accommodated.

2. ## Investigation: How length affects the resistance in a wire.

"ƒigÿ!i""#"ƒigÿ\$i%"&"'(")"*+",ÿÚ""ó""\"FD ________________ ",c"Ô”"|¾"8c "|¾ " ________________ " " ""8âÿ?ÿâ """"""ÿÿÿÿ "ƒigÿ!i""#"ƒigÿ\$i%"&"'(")"*+",ÿÚ""]""Â",Ò ",c"Ô”"|¾"8c "|¾ " ________________ " " ""8âÿ?ÿâ """"""ÿÿÿÿ "ƒigÿ!i""#"ƒigÿ\$i%"&"'(")"*+",ÿÚ""Ã""("æ ",c"Ô”"|¾"8c "|¾ " ________________ " " ""8âÿ?ÿâ """"""ÿÿÿÿ "ƒigÿ!i""#"ƒigÿ\$i%"&"'(")"*+",ÿÚ"")""ï¿½"æ ",c"Ô”"|¾"8c "|¾ " ________________ " " ""8âÿ?ÿâ """"""ÿÿÿÿ "ƒigÿ!i""#"ƒigÿ\$i%"&"'(")"*+",ÿÚ""Å½""ø"FD ________________ ",c"Ô”"|¾"8c "|¾ " ________________ " " ""8âÿ?ÿâ """"""ÿÿÿÿ "ƒigÿ!i""#"ƒigÿ\$i%"&"'(")"*+",ÿÚ""ù""h"¢ ",c"Ô”"|¾"8c "|¾

1. ## Physical - Circuit

2.27 0.36 25 0.9 2.34 0.39 30 1 2.37 0.43 As the table shows above, the resistance of the length 5cm and 10cm were equal, and then it suddenly decreases. This shows there's an error; I think it happened because we didn't set our circuit in the correct positon.

2. ## &amp;quot;Are rechargeable batteries more economical than alkaline batteries?&amp;quot;

The batteries are acquired from Dick Smith's in Australia, therefore there may be a price variance, but the results can definitely be used as a guideline. Initially, the brightness of each bulb was not very subjectively different. However, after 4 hrs, Eveready Gold and Eveready Heavy Duty both became significantly dimmer in brightness compare to the other batteries.

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