Investigating Resistance

The first 200 words of this essay...

Science Coursework/Investigating Resistance

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Michael Hanna

12A3

Mr. Dean

Problem:

Colm, the lab technician, needs some 5 ohm resistors for an experiment but has none in stock. All he has is some Nichrome wire?

Investigate one of the factors which affects the resistance of a wire.

My aim in this investigation is to find out how the length affects the resistance of a wire. f

To understand my investigation I have given some written information supported by scientific knowledge.

To attain the most precise result, a number of factors need to be considered which enables us to achieve this. The variables are:

? Temperature

? Diameter of the wire;

? Material of the wire

Diameter of the wire

By increasing the diameter of the wire we offer more space or routes for the electrons to pass through, therefore meaning fewer collisions with the other ions and less resistance. If the cross sectional area is smaller there will be greater resistance because there will be to more collisions between the ions as there are fewer routes for the electrons to pass through.cobc bcr