Therefore, I think that the amount of paper clips picked up will increase as the voltage gets higher until the electromagnet can't pick up any more paper clips. I also predict that the more coils wrapped round the wire creates a bigger magnetic field allowing more paper clips to be picked up.
Variables
Thickness Coils
Length of wire
Core Material
If the paper clips are already slightly magnetized from previous experiments
Weight of the Paperclips
Number of Paperclips available
Equipment Mat - (To protect the surface of the bench)
Power Pack - (To control the voltage of the current)
*Battery Pack ? (To control the voltage of the current)
Crocodile Clips - (To take the electricity to the Electromagnet)
Paper Clips ? (To test the conductivity of the Electromagnet)
Electromagnet Iron Nail - (to act as a core) Wire - (wrapped around the core)
Test the Voltage Method 1... displayed 300 characters
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Take the Iron rod and wind the wire around it, leaving the two ends of the wire free.
2. Plug two crocodile clip leads into the Power pack and attach each crocodile clip to a different end of the wire which is wound around the rod.
3. Turn on the power to the required voltage (I had a problem with the power pack because they kept short circuiting so I decided to use a battery pack but they would drain very quickly and could only test 2, 4, and 6 volts) and then bring the box of paper clips up so that they are touching the Iron rod
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