... that I am going to measure for the experiment is the voltage that is induced by the input variable. For this investigation I shall pose the question 'how does the amount of turns in a coil affect the voltage induced?' This means that the input variable I am going to change will be the number of turns in my coil and I shall measure the change by the voltage induced. To make sure my experiment is a fair test, I shall keep the following variables the same: * Strength of the magnet * Speed the magnet is moving * Area of the cross-section of the coil These variables have to remain the same as, if any of them were changed then it would have an affect on the results I achieve. In order to keep the strength of the magnet the same, I shall use the same magnet throughout the whole experiment, as I know its strength ...

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