Ohm’s Law Investigation

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Ohm’s Law Investigation

Introduction: In the following experiment, I predict that the filament

bulb in which we are testing, on will not obey ohm's law. Their are many

factors which make me believe this, such as the temperature of the bulb.

If the filament bulb DID obey Ohm's Law, then the temperature would remain

constant, meaning there would be resistance.

When I think of a light shining, the temperature does not stay the same.

Therefore I believe that the light bulb will not obey Ohm's law.

The formula for Ohm's law  is:

RESISTANCE = pd            or        R = V

           current                       I

The current through a wire is proportional to potential difference (voltage

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across the wire) providing the temperature does not change - (which I predict

it shall).

CHANGE IN TEMPERATURE = CHANGE IN RESISTANCE

To make this a fair test, I must keep a close watch of the readings. I will

include a trial run to make sure everything goes to plan. I will record the results

3 times - so I can be certain that we are exact in the experiment.

SAFETY:To prevent any electric shocks, it is important that we wash our hands thoughly,

so no water reaches the wires. We must also check ...

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