Directions: Read the questions carefully. Write the letter of the correct answer on the
answer sheets in pages 7 -9.
1. Which concept is shown in the picture?
A. electric generator C. electromagnet
B. electric motor D. transformer
3. Take down important concepts and list questions you would like to
ask from your teacher.
2. What is the metal center of an electromagnet?
A. coil C. current
B. core D. wire
3. How can the strength of the magnetic field of an electromagnet be increased?
A. Decrease the number of coils C. Decrease the current
B. Increase the number of coils D. Increase the light
4. Which of the following is NOT a part of a simple electromagnet?
A. Iron C. toothpick
B. power source D. wire
5. Which of the following can be attracted by a magnet?
A. cotton ball C. piece of soap
B. piece of metal D. rubber bands