Question

A.
11. Which of the following can make an electromagnetic stronger?

A. Increase the number coils of the wire C. Use a bigger core
B. Add more dry cell
D. All of the above
12. Which device makes use of electromagnet?
A. telephone
B. electric buzzer
C. electric bell
D. all of the above
13. Which is a part of an electromagnet?
A. wire B. pin C.thumbtacks D. needles
14. Which of the following is a conductor in an electromagnet?
A. Copper
B. rubber C. plastic D. wood
15. Which is NOT part of an electromagnet?
A.magnet B. wire C. nail
D. batte
16. Which activity uses an electromagnet?
A. polishing the floor
B. Using a door bell
C. lighting a room
D. cooking
17. In constructing an electromagnet, which material do you need?
A. dry cell
B. wire
C. iron nail
D. all of the above​

Answer 1

17

A)Dry Cell

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