• 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 find how the resistance of a wire varies with length

Extracts from this document...

Introduction

Investigation - To find how the resistance of a wire varies with length 1st Section - Prediction and Planning Introduction: I am going to conduct an experiment to investigate how the electrical resistance of a wire changes in relationship with it's length. Prediction and Planning: I think and have good reason to believe that as the length of the wire increases, the resistance will increase too. Not only that but I also believe that the rate at which the resistance of the wire increases will be directly proportional to it's length. ...read more.

Middle

When there is potential difference across a conductive material all the free electrons arrange themselves in lines going in the same direction (this is electric current). Resistance occurs when charged particles in the current collide with fixed particles in the material. So as you increase the resistance of a material you also need to increase the force used to push the current. Resistance (ohm's/?) = Volts divided by Current (Amperes) This is Ohm's Law, However it only applies if the temperature of the wire stays constant. ...read more.

Conclusion

Then we repeated the process twice to allow us to take an average. We started at 500mm because an earlier experiment has shown that if the wire is too short then the wire will get hot and the readings of the Voltage and Current will fluctuate wildly. The material and cross-sectional area of the wire was kept constant for the whole experiment. 2nd section - Obtaining evidence Length (mm) Voltage (v) Current (amps) Resistance (?) 500mm 3.18 0.79 4.03 600mm 3.33 0.64 5.20 700mm 3.40 0.56 6.07 800mm 3.47 0.51 6.80 900mm 3.43 0.45 7.62 1000mm 3.51 0.42 8.36 1100mm 3.54 0.38 9.32 1200mm 3.58 0.34 10.53 1 ...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

# Related GCSE Electricity and Magnetism essays

1. ## How The Resistance Of A Wire Varies With Length.

From this I then worked out the current. Preliminary Results: Problems: However many problems did occur with this first experiment. First of all the ammeter and voltmeter kept comming up with negative readings or none at all. The wires kept comming loose and the wire was not straight so the measurments would not of been accurate to the nearest millimeter.

2. ## An experiment to find how the resistance of a pencil lead varies which the ...

As the pencil lead "hardness" increased, the resistance would increase due to the pencil becoming denser. This would almost certainly not give a great enough number of results, or a great enough range. I decided upon length, due to ease of use (a ready-prepared lead with attached ruler), accuracy (to

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