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# My aim is to investigate how to make electromagnets stronger to increase the amount of paperclips the iron bar magnet can pick up.

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Introduction

Aysha Iqbal

Electromagnets.

Aim: my aim is to investigate how to make electromagnets stronger to increase the amount of paperclips the iron bar magnet can pick up.

The investigation consists of us doing a practical experiment in which we have to see what the outcome is by observing whether or not an iron bar magnet wrapped with a wire will pick more or less paper clips by increasing the number of coils.

Basic Method:To set up the voltmeter (power pack). Remember leave it on two volts only. To create a circuit this will include the following iron bar magnet with coils around it. Attach to crocodile clips from the power pack to the iron bar magnet. To observe that by increasing the number of coils around the iron bar magnet results in increasing the amount of paper clips that are picked up.

Prediction: I predict that by increasing the number of coils the more paper clips I will be able to pick up with the iron bar. This is because when an electrical current flows through the coil wire, a magnetic field will be produced around the coil wire.

Middle

I began creating my coils. I first started with five coils and then went up in fives until 25.I will make sure I put the power pack on two volts.

I will do the investigation three times for more precise and clear results.

Fair Testing: To make sure my investigation is a fair test I will keep these things the same:

• Iron bar magnet
• Length of wire
• Sized volt
• Power pack

The only thing I will change is:

• The amount of coils on the iron bar magnet

Diagram:

Results:

 No of coils No of paper clips Average Test 1      Test 2        Test 3 5 4                 2               4 3 10 10              12             12 11 15 19              23             20 21 20 28              32             51 37 25 54              50             56 53

Conclusion

I did not discover any anomalous result, which hopefully meant that my experiment went according to my plan.

My results were reliable because they proved my prediction to be correct. In my prediction, I said that that by increasing the number of coils the more paper clips I would be able to pick up with the iron bar. My results showed that each time the coils were increased the amount of paper clips picked up increased too.

I could carry out some other investigations to see if the results differ to the result I have. I could also see if the magnetic effect of the coils can be increased by

• Increasing the size of the current flowing through the coil. This would increase the strength of the magnetic field around each length of the coil wire
• Placing an iron core inside the coil. This would concentrate the magnetic field into a magnetic material, increasing the overall magnetic effect of the coil.

This student written piece of work is one of many that can be found in our AS and A Level Fields & Forces section.

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