How Different Amplitudes Affect the Strength of an Electro Magnet.

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Daryl Breakwell                           11KR                          Physics Coursework

How Different Amplitudes Affect the Strength of an Electro Magnet

Planning

Diagram

Equipment List

2 Iron ‘C’ cores

Boss stand and clamp

Variable Voltage Power Supply (VVPS/Power Pack)

Ammeter

Wire

Method

I will measure the current using an ammeter, as the voltage is to small to measure, and the amplitude (current) is whole numbers. To measure the strength of the electro magnet I will hold it in a boss stand and clamp. I will then add 100g weights until the iron core the magnet is not strong enough and breaks its link with the core. I will have eight coils on the magnet, as any more and it would be to strong. I will repeat do the experiment at 0.0, 0.2, 0.4, 0.6, 0.8, 1.0 amps. I will then repeat it 3 times and take an average of my results and plot them on a graph.

Factors to vary, control or take into account

In my experiment, I could vary several things such as: the amplitude (current), the voltage, the amount of coils on the magnet, the size of the core or the type of wire used. To make it a fair test I will use the same equipment, keep everything the same, apart from the varying factor. I will also keep the magnet at the same height, this is so that the Gravitational Potential Energy (GPE) will stay the same and not affect my results.

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Safety

I will be careful using main electricity, doing things such as plugging and unplugging the VVPS. I will also be careful not to leave the electro magnet on to long as the wire will start to melt. Finally, I will put something soft underneath the electro magnet. This is encase the weights suddenly come off. This will stop the weights from breaking, and the desk from being damaged.

Number and range of results

I will take 6 sets of results so I can plot an accurate graph. I will repeat my experiment three times and take an ...

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