(30 Quarter) Score: me: hoose the letter of the best answer. 1. Which acts like a magnet? A. nail B. wire C. dry cell D. none of the above 2. What is produced when electricity flows in a conductore D. wire A. coil C. nail B. magnetism 3. When does an electromagnet operate? A. When there is a nail. B. When there is a wire. C. When there is a dry cell. D. When there is a flow of electricity. 4. Which one is NOT part of an electromagnet? A. the coil of wire B. the nail as the core C. the dry cell as source of electricity D. pins, clips, and needles attracted by an electromagnet 5. What happens when a part of an electromagnet is disconnected A. It loses its magnetism. B. Electricity continues to flow through it. C. The electromagnet becomes a permanent magnet. D. There is an increase in the number of materials attracted 6. Which appliance does NOT Use electromagnet? A. telephone B. television C. radio D. broom 7. Which is NOT made of electromagnet? A. cooking pan B. transformer C. generator D. motor 8. Which of these forces can be used in a motor? A. magnetism B. wind C. friction D. gravity 9. Electromagnets are A. permanent B. instant C. temporary D. stable 10. Which makes an electromagnet work? A. needle B. electricity c.pin D. thumbtacks 11. Which of the following can make an electromagnetic strongere A. Increase the number coils of the wire B. Add more dry cell C. Use a bigger core 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 14. Which of the following is a conductor in an electromagneta A. Copper B. rubber 15. Which is NOT part of an electromagnet? A. magnet B. wire C. nail 16. Which activity uses an electromagnet? A. polishing the floor D. needles C. Plastic D. wood D. battery B. using a door bell C. lighting a room D. cooking 17. In constructing an electromagnet, which material do you neede A. dry cell B. wire
