Mira did an investigation on how the number of coils around an electromagnet affected the number of paper-clips it picked up. She collected some results as shown in the given table.
Number of coils
Number of paper clips picked up
One of the result is anomalous. Which one?
Important Questions on Magnets
Mira did an investigation on how the number of coils around an electromagnet affected the number of paper-clips it picked up. She collected some results as shown in the given table.
| Number of coils | Number of paper clips picked up |
Plot a line of best fit on your graph but don't include the anomalous result.
Mira did an investigation on how the number of coils around an electromagnet affected the number of paper-clips it picked up. She collected some results as shown in the given table.
| Number of coils | Number of paper clips picked up |
What conclusions can Mira draw from the results?
Lee changed both the number of coils and the current when he did his investigation. When he increased them both, he picked up more paperclips. Why can't he conclude that the number of coils affects the strength of the electromagnet.
Why can't you make an electric bell using a permanent magnet?
Maglev trains have very small maintenance costs. Give a reason why you think people haven't built more of them.
Define permanent magnet.
Define electromagnet.
Define magnetic material.
