Eli and AiR

Magnet levitation
Research:

We'll be using an electromagnet to measure the height of the copper ring. It's going to be one end of a iron bar that only has one side of the magnet field, the north magnet. We're on the branch of physics, of how the magnetic field will lift stuff.

3 aspects are finding out what an electromagnet is and how it works, what AC current is, and the difference from AC and DC.

http://en.wikipedia.org/wiki/Electromagnet
To make the magnetic field made by a wire, it is in a coil. The magnetic field whould go through a wire, through the center of the coil, creating a magnetic field; a coil forming the shape of a tube. Much stronger magnetic fields can be produced if you put a different bar, such as soft iron, is placed inside the coil. The core magnifies the magnetic field to thousands of times the strength of the field of the coil alone. This is a iron-core electromagnet.

The usual wave of an AC current circuit is an sine wave. In certain things, different waveforms are used, such as triangular or square waves. Ipod and radio signals carried on electrical wires are also examples of alternating current in these things. This is AC current.
CAUTION: DO NOT LEAVE ELECTROMAGNET ON TOO LONG! YOU MIGHT GET SEIRIOULY INJURYED OR EVEN POSSABLY DEATH.


Problem: How much height could the copper tube float with magnetism?
Hypothesis: We hypothesize that the copper tube will rise higher with more watts.
Materials:
· Electromagnet
· Copper tubes
· Lab Volt
· Steel Rod
· A/C Cables
· Ruler

Procedure:
1. Gather the materials.
2. Connect A/C cables to electromagnet from the LAB VOLT ™
3. Put steel rod in the electromagnet from the bottom up.
4. Place and test the Copper tubes on the steel rod.
5. Take measurements with ruler from the top of the electromagnet from of copper ring (make sure that the bottom is leveled)
List of Variables
Control – Type of core
Control – Voltage
Independent - Size of copper tube
Dependant – how high the copper tube goes
CAUTION: DO NOT LEAVE ELECTROMAGNET ON TOO LONG! YOU MIGHT GET SEIRIOULY INJURYED OR EVEN POSSABLY DEATH.
Observing and recording:


The height of the Copper tube (in cm)

1st TRY
2nd TRY
3rd TRY
8.4 g copper
1.5 cm
1.7 cm
1.7 cm
12.3 g copper
1.8 cm
1.5 cm
1.7 cm
18.2g copper
1.4 cm
1.5 cm
1.4 cm

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(The voltage stayed at 10 volts on every test)
Conclusion:
Our hypothesis was correct. When the smallest copper tube is on the electromagnet, it goes the most highest out of the three tubes. When the longest tube goes on the core, it floats more lowly than the other tubes.
Source of Error:
- Amount of voltage.
- Weight of copper tubes.