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# Ohms Law - We are going to find out what factors affect the ammount of voltage in a wire.

Extracts from this document...

Introduction

Ohms Law

We are going to find out what factors affect the ammount of voltage in a wire.

Theory

As soon as we turn on the power pack electrons are being forced through the wire. If we increase the voltage on the power pack this generates more heat in the wires but this can not be controlled. If the resistance wire is long it will take longer for the electrons to pass through. Just like if you were trying to run  round a running track and sombody was holding you back. It would take longer for

Middle

his diagram shows how i will setup the equipment

Prediction

As we change the length of the resistance wire the amount of current flowing through the wire the will decrease. I expect the reading of a longer piece of wire to have a lower voltage then a piece of wire with a smaller resistance.

What factors are going to change?

The amount of current going through the wire will change as the length of the resistance wire changes in size. We will keep the voltage put out by the power pack the same. The readings on

Conclusion

- 0.59

.............................................................................

- 0.98              - 0.71                   40 CM

- 0.97              - 0.72

- 0.97              - 0.73

............................................................................

- 0.84             - 0.87                   30 CM

- 0.84             - 0.87

- 0.84             - 0.88

...........................................................................

- 0.73             - 1.00                   20 CM

- 0.72             - 1.01

- 0.72             - 1.01

..........................................................................

- 0.48            - 1.31                     10 CM

- 0.48            - 1.32

- 048             - 1.34

*+

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