How Do Coil Turns and Current Affect Electromagnet Strength?

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1. Touch small metal paper clips with your unmagnetized iron nail to confirm it does not attract them on its own.
2. Wrap a single layer of electrical tape around the shaft of the iron nail to shield the core surface.
3. Wind the copper wire tightly around the taped nail in a single direction, leaving 2 inches of loose wire at both ends.Keep every turn going in the exact same direction, or the magnetic fields will cancel each other out.
4. Scrape 1 inch of outer enamel insulation off both loose wire ends using fine sandpaper until bare metal shows.Handle wire tips carefully to avoid minor skin punctures.
5. Align two 1.5V D-cell batteries end-to-end in series and tape them firmly together to build your power supply.
6. Tape one stripped wire end securely to the negative terminal of your combined battery unit.
7. Spread a pile of paper clips flat on your table beneath the point of the core.
8. Press the other bare wire end against the positive terminal for under 5 seconds to activate your electromagnet.Limit terminal contact to under 5 seconds per trial to prevent the wire and battery from rapidly overheating.
9. Dip the tip of the wrapped nail into the paper clip pile while holding the wire on the battery terminal.Avoid touching bare connection points during power bursts, as high current can cause wire burns.
10. Lift the core upward and count how many paper clips hang from the tip.
11. Detach the loose wire end from the positive terminal right after reading your count to break the electric current.
12. Log the clip count in your notebook under your current setup configuration.
13. Repeat this brief attraction test three times and average your clip counts for an accurate strength measurement.