rt II
A. Encircle the letter of the correct answer.
Which of the following is NOT part of an electromagnet?
a. Wire
6 Iron
c. Toothpick
d. Power source
2. This is a picture of a simple electromagnet. How can the electromagnet be made stronger?
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a. Add more coils of wire to the nail.
b. Use a smaller battery.
c. Reverse the poles of the magnet.
d. Remove all the coils and the nail.
3. Which of the following is shown in the picture?​