Make a magnet that turns on and off with electricity
CAUTION: Do not hold the wire on the battery for long periods without removing it. The wire and/or the battery terminal may get hot. The nail is sharp, handle with care.
- Large nail
- Plastic coated wire (stripped of the plastic at each end)
- Washer or paper clip (any metal object containing iron will work)
What to do:
- Wind the plastic coated wire tightly around the nail about 40 times - more turns makes a stronger magnet. It doesn't matter if the wire turns overlap.
- Hold one end of the stripped wire to one end of the battery (terminal), and the other end of the stripped wire to the other battery terminal.
- With the wire connected to the battery, pick up your metal object (washer or paper clip) with the sharp end of your new electromagnet.
- To turn off the magnetism, break the circuit by removing the wire from the end of the battery.
- Can you think of a way to hold the wires onto the battery without using your fingers - masking tape and paper clips might get you started?
- As a further project you might like to use things around your house to design a base and mount to hold the nail and battery in place. Make sure you get your parents to help.