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Build: electromagnet strength test — Homework
Use this week's controlled-experiment and electromagnet-strength ideas.
- 1.An electromagnet with 10 turns lifts 2 paper clips; the same setup with 30 turns lifts 7. What does this suggest?
- 2.Why must the same battery be used in both trials when testing how turns affect strength?
- 3.If an electromagnet with 15 turns lifts 3 clips, would one with 45 turns (same wire, same battery) lift more, fewer, or about the same?
- 4.Why does turning off the current make an electromagnet lose most of its magnetism, unlike a bar magnet?
- 5.Design your own fair test of one variable affecting electromagnet strength, describing what you would hold constant and how you would measure strength.
🌲 Homeschool of the FutureEighth Grade · Science · week 25 homework