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Make coils of 25, 50, 75, and 100 turns. Connect each to the same cell, one by one. Note the deflection of a compass kept in the same place each time. Draw a conclusion about how the number of turns affects the strength of the electromagnet.
Show sample answer
More turns make a stronger electromagnet.
Good Practices
- Keep the cell and compass position the same each time.
- Change only the number of turns.
- Note the deflection for each coil.
- You will see more turns give more deflection.
- So more turns mean a stronger magnet.
Increasing the coil turns increases the magnet's strength.
