Choose the letter of the best answer.
1. Which acts like a magnete
A, nall
B. wire C. dry cell D. none of the above
2. Which is NOT made of electromagnole
A cooking pan B. transformer C. generator D. motor
3. Which of these forces can be used in a motor
A magnetism
B. wind
C. friction D. gravity
4. Electromagnets are
A. permanent B. Instant C. temporary D. stablo
5. Which makes an electromagnet work
A needle
B. electricity
c. pin
D. thumbtacks
6. Which of the following can make an electromagnetic strongora
A. Increase the number coils of the wire
C. Use a bigger coro
B. Add more dry cell
D. All of the above
7. Which device makes use of electromagneta
A. telephone
B. electric buzzer C. electric bell D. all of the above
8. Which is a part of an electromagnete
A. wire
B. pin
C. thumbtacks D. noodles
9. Which of the following is a conductor in an electromagnola
A. Copper B. rubber C. plastic D. wood
10. Which is NOT part of an electromagneta
A. magnet B. wire C. nall D. battery
11. Which activity uses an electromagneta
A. polishing the floor
B. using a door bell C. lighting a room D. cooking
12. In constructing an electromagnet, which material do you neede
A. dry cell
B. wire
C. Iron nall
D. all of the above
13. What happens when one end of the wire is disconnected from the dry cells
A. Electricity continues to flow.
B. Magnetism is gone.
C. The electromagnet becomes permanent.
D. It becomes stronger.
14. Which of the following will be attracted to an electromagnet?
A. pins
B. needles C. thumbtacks D. all the above
15. Which is an example of a temporary magnet?
A. bar magnet B. horseshoe magnet
C. electromagnet
D. magnetite​