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Answer the following questions briefly:

1. When did the nail become a temporary magnet?

• As the copper wire is loop around the iron nail and connect it to the battery, the changing electric field creates a changing magnetic field which resulted to the nail becomes a temporary magnet or electromagnet.

2. What happened to the nail when one end of the wire was detached?

• When one end of the copper wire is detached, the nail loses its magnetism.

3. What did you observe when only one dry cell was used?

• When one dry cell is used, the magnetism produced by nails is weaker compared when you used two or more dry cell or battery.

4. What happened when two dry cells were used?

• Two or more dry cell increases the strength of magnetism in the nails.

5. What is the difference of using 1,2, and 3 dry cells?

• one dry cell produces weaker magnetism and 2 dry cell produces stronger magnetism and the 3 dry cells produces the strongest magnetism in the nails.

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