How Electricity Affects AC Electromagnetism(not finished YET!)

	Project title: How Electricity Affects AC Electromagnetism(not finished YET!)
Difficulty level:	Elementary school
Main link:	None

Hypothesis:

I presume it will alter the clips it picks up and the power it gives out.

Materials:

1. 2 coils of wire
2. iron bolt
3. variac
4. AC electromagnet
5. DC electromagnet
6. paper clips
7. 2 LEDs

The Procedure:

Materials:
1. 2 coils of wire
2. iron bolt
3. variac
4. AC electromagnet
5. DC electromagnet
6. paper clips
7. 2 LEDs

Methods:
1. First, wind a coil of wire onto a form. The coil needs to be able to handle 30V AC or DC.
2. Next, select an Iron bolt to fit snugly in the coil form.
3. The bolt should then be fit into the coil form. It should extend about 25 mm beyond the end of the coil form.
4. Connect up a variac to the coil so you can control the voltage and current going to it.
5. Pick up several paper clips to show how the DC/AC electromagnet works. Next, turn the variac down to zero, to show how the paper clips fall off the end of the bolt.
6. Fix the AC/DC voltage and change the number of coils, then repeat step 5 10 times. Observe what happens each time, then move on to step 7.
7. Change paper clips to magnet and see if there is any difference between DC electromagnet and AC electromagnet.
8. Have another coil of wire, with two LEDs attached back to back across the terminals (so they are in parallel with each other, but with opposite polarity). Use both DC and AC electromagnets and observe what happens when the second coil is placed on the bolt.
9. Connect up a variac to the coil so you can control the voltage and current going to it.
10. Change both LEDs into a resistor and measure the voltage across the resistor with a multi-meter.