This video explains how to make an electromagnet. Watch it and answer the questions below the video.
1. Why is it necessary to wrap copper wire around the nail?
2. Do you think this experience would still work if a piece of aluminium rod, length 6 cm, was used? Explain your answer.
Construct this electromagnet for yourself and answer questions 3 and 4.
3. How many paper clips (or pins) were you able to pick up with your electromagnet using only one battery?
4. Use two batteries in your electromagnet and state how many paper clips ( or pins) you were able to pick up?
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