Write the word TRUE if the statement is correct. If the statement is FALSE, replace the underlined words to make the statement true.
1.An electromagnets may be produced by making electricity flow through a coil of wire around and iron nail.
2.When electricity stops flowing through a coil of wire, the nail continuous attracting any metal or magnetic material.
3.An electromagnet can be made stronger by using less coils of wire.
4.The number of dry cells used affects the magnetism of an electromagnet. More dry cells mean less magnetism.
5. Electromagnets are permanent magnet can attract any metal or magnetic material.
6.An electromagnet has magnetic force only when electric current is flowing through.
7.Electromagnets are used in computers,loudspeakers, doorbells,and pieces of furnitures.
8.Electromagnetic help control and transmit signals for telephones, radio,speakers, and tape recorders.
9.Magnetic Resonance imaging (MRI) relies on electromagnets to a physicians to make diagnosis without surgery or X-rays.
10.All electromagnet have the same magnetic force.
Share
Verified answer
Answer:
1. True
2. False
3. False
4. True
5. False
6. True
7. True
8. True
9. True
10. False
(●'◡'●)