[PDF] You can build an electromagnetic fishing pole and catch

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Below is the list of “ingredients” you'll need to build an Electromagnet allow you to create your own unique design 150 – 200 times around the screw

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[PDF] You can build an electromagnetic fishing pole and catch - ASHRAE

In this activity, students will make an electromagnet with wood and wires The more times the wire is wrapped around the nail, the stronger the magnetic field

[PDF] Build a Motor

requiring the students understand magnets and electromagnets and that they To build the coil, have the students wrap the wire around the marker a handful

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[PDF] You can build an electromagnetic fishing pole and catch - ASHRAE

36739_3Elem_Go_Fish.pdf

Go Fish

You can build an electromagnetic fishing pole and catch some fish with magnetic personalities!

Grade level

Elementary

Materials

Piece of wood 12" long, 1/2" x 3/4" Two wires (41 " and 2") with the ends stripped: one end stripped to " and the other to 1/2" One 2 1/2" nail D-size battery Electrical tape Two 1/2"-screws Paper clips

Discussion

Engineers use magnets in motors, audio

speakers and medical equipment, just to name a few uses. Magnets are useful because they generate a force called a magnetic field. You've seen the effect of a magnetic field when watching a magnet attract, or pull, an object. Magnets have a north and a south pole. The same kind of poles push each other apart and different poles attract or pull each other together.

Metals are made up of groups of atoms. If

these groups are lined up in the right way, a magnetic field is produced. Electricity flowing through a wire has the ability to line up the groups of atoms in metals, creating a magnetic field, and turning the metal into an electromagnet.

In this activity, students will make an

electromagnet with wood and wires. The more times the wire is wrapped around the nail, the stronger the magnetic field becomes. An electromagnet acts just like a permanent magnet except an electromagnet is turned on and off by starting or stopping the flow of electricity through the wire.

Activity

1. Put two screws into the wood, one 3" and

one 4" from one end. Leave about 1/4" of each screw exposed. Drill a hole 1/2" from the opposite end. The hole should allow two wires to pass through.

2. Place the battery on the wood, near the

screws. Fasten the battery to the wood using the electrical tape.

3. Leave 7" of wire from the short stripped

end of the wire. Start wrapping the wire tightly around the nail, starting from the head of the nail. Stop wrapping the wire around the nail when about 13" of wire are left to the long stripped end of the wire.

4. Pull the 7" long piece of wire through the

hole. Tape the bare wire to the battery.

5. Pull the 13" end of the wire through the

hole. Wrap the bare end of the wire, starting at the yellow insulation, around the bottom- most screw twice. Make a loop at the end of the bare piece of wire. Wrap the small wire around the top screw twice then tape the other end to the battery. Touching and holding the loop to the top-most screw will cause electricity to flow through the wire.