Electromagnetism

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Last updated 12:53 PM on 5/26/26
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7 Terms

1
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What are two factors that increase the strength of an electromagnet?

  1. Increase the current through the wire

  2. Increase the number of coils

2
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What is the relationship between the amount of paper clips picked up and the number of coils?

The higher the number of coils, the more paper clips picked up. (Positive correlation)

3
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What is the independent variable?

Number of coil turns

4
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What is the dependent variable?

Number of paper clips picked up

5
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What is the control variable?

  • current

  • Size of paper clips

  • Material of the wire

6
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What is the method?

  1. Wind the insulated wire tightly around the nail to make an electromagnet of 10 turns.

  2. Just power pack to the current 0.5 A.

  3. Attach as many paper clips to the electromagnet as it will hold.

  4. Count the number of paper clips and record on the table. Switch off the electromagnet

  5. Switch back on, keep the current at 0.5 A and repeat the paper clip reading, Record on the table and calculate the average.

  6. Repeat the process increasing the number of if turns by 10-50 coils.

7
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How do you make the experiment more accurate?

By using smaller paper clips.