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In This Investigation, I am trying to find out what affects the strength of an electromagnet. I will do this by carrying out two separate experiments. These will involve changing one aspect of each experiment, whilst keeping all others the same.

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Introduction

8th May 2003

Chris Phillips

Electro Magnets Coursework

Aim:

In This Investigation, I am trying to find out what affects the strength of an electromagnet. I will do this by carrying out two separate experiments. These will involve changing one aspect of each experiment, whilst keeping all others the same.

Electro-Magnets

Electro-Magnets are caused when a current is passed through metal, causing “domains” inside the metal to face in one direction. When a metal is completely non- magnetized, all the domains within the metal cancel each other out, by connecting to each other from head to toe. When the current is passed through the metal, the domains free from their fixed positions and all face in one direction, not connected to one another, and therefore try and connect to domains in other metals close by, causing the magnet to attract another metal (See scientific theory.)

Scientific Theory.

In a non-magnetic piece of metal, domains with in it and connected together, and cancel each other out. This is what causes it to be non magnetic.

When a small amount of current is put through

...read more.

Middle

1.I will start this experiment by connecting, two insulated wires, to the Power Pack. I will then connect to end ends of the insulated wire two crocodile clips and make sure they are on securely.

        2.Before connecting the wire to the nail, I will wrap the wire round the nail, leaving open strands of the wire at each end of the nail. After doing this, I will connect the crocodile clips to the wire, and make sure connections are not loose.

        3.I can then take a piece of metal, and place it on a balance and record the weight accurately.

        4.I will then make sure the volt rating on the power pack is set to zero, and turn the power pack on.

        5.I can then turn the power pack rating up to 2 volts, and place the electro magnet over the balance with a piece of metal on, and measure how much the weight decreases with the magnet pulling the metal up.

        6.After carrying this out, and recording my results in a chart, I can repeat the process with higher voltages.

How I Will Carry Out Experiment 2

...read more.

Conclusion

zard of getting at electrical shock. I will make sure the set voltage is not high enough to make enough heat to burn my fingers when I am adjusting the coils.

How many results

I will collect 2 sets of results for each experiment, and take an average for each experiment; this will allow me to cater for problems and strange results I may encounter in one of the two tests.

Number Of Coils Around The Nail

Current Flowing Through Circuit (V)

How Much Weight Decreases (grams)

10

1

10

2

10

3

10

4

10

5

10

6

Number Of Coils Around The Nail

Current Flowing Through Circuit (V)

How Much Weight Decreases (grams)

5

2

10

2

15

2

20

2

25

2

30

2

...read more.

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