• 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

# Calculate the level of Resistance within A piece of wire at different lengths.

Extracts from this document...

Introduction

Science G.C.S.E course work

Timothy Samson 11RW

Calculate the level of Resistance within

A piece of wire at different lengths

AIM: I am trying to find out what the level of resistance would be on a piece of wire at different lengths as the current passes through

PREDICTION: I predict that each time I change the length of the wire i.e. 0-10, 0-20cm etc the voltage will increase, which means the resistance will increase to.

I think this because I know that current is a flow of electrons, and the piece of wire is a solid which is dense. In a short piece of wire there are not many atoms for the current to pass thought so the resistance is small. But as the piece of wire increases in length so dose the number of atoms within the wire, therefore the greater the resistance.

To back up my prediction I have found a quote from the new edition physics book page 98, it reads:

“The resistance of a resister stays the same providing the temperature

Dose not change, but in a lamp the filaments dose change so its resistance changes.

Middle

RESULTS: These are the measurements I made; I can also show these results on graph

 Length (cm) 10cm 20cm 30cm 40cm 50cm 60cm 70cm 80cm 90cm Current (amps) 1.05 0.95 0.85 0.73 0.67 0.61 0.57 0.53 0.48 Voltage (volts) 1.35 2.5 3.45 4.15 4.7 5.12 5.68 6 5.8 Resistance (onus Ω) 1.28 2.63 4.05 5.68 7.01 8.39 9.96 9.96 12.08

SET OF RESULTS NO. 1

SET OF RESULTS NO.2

 Length (cm)

Conclusion

EVALUATION

MY RESULTS: my results are good enough to answer the question I was investigating because, the results that were taken prove my theory true, which was as the length increased the higher increase of the resistance, this was proven because as i changed my length i.e. 10cm to 20cm etc he resistance became bigger.

MEASUREMANTS: My measurement are accurate because all of the measurements

(bar 1 ) fitted the line of best fit and it was proven that there was a strong correlations.

ODD RESULTS: The results that did not fir the pattern were in the second set of results at the length of 40cm, the resistance was 5.91Ω and this did not fit the line of best fit

I THINK THIS BECAUSE: Maybe the result was caused by an inaccurate reading from the ammeter or voltmeter.

MY PLAN/GOOD RESULTS: My plan gave me good results because I used a well designed voltmeter/ammeter.

My calculations were to 2 decimal places and I took two sets of result to compare them.

HOW I COULD MAKE IT BETTER: I could make my experiment better by using a real quality ammeter and voltmeter and maybe I could change the voltage passing thought the wire. Or even I could change they type of wire and compare the results with Nichrome

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. ## Investigate the resistance of different wires and how at different lengths the voltage increases ...

the proper equipment in the school laboratory to control so it will always have an effect on my results. The heating affect is where when heat passes through the atoms in the wire these atoms vibrate and as they vibrate create a higher chance o colliding with atoms which then causes an increase in resistance.

2. ## Restoring a Volksempfnger VE 301 GW (Nazi people's radio) This is a piece of ...

old caps were rated 1500 V ~ . If no replacement of the same or higher voltage is available you really have to understand the schematic what voltage is applied. These tuned radio frequency sets (TRF) with feedback can produce higher voltages than the plate voltage when oszillating.

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