Learning Task 5. Read each item carefully. Choose the letter of your answer.
1. Why is the wire used in an electromagnet coiled?
a. It has more force.
c. It controls the field of attraction.
b. It controls the flow of electricity. d. It makes the electromagnet
stronger
2. Which of the following can make an electromagnet stronger?
a. by adding more dry cells
c. by using a core with a bigger
diameter
b. by increasing the number of turns in the coil of wire d. all of the
above
3. Which of the following devices make use of electromagnets?
a. telephone b. electric bell C. electric buzzer d. all of the above
4. Which one of the following is not a part of an electromagnet?
a. the coiled wire
c. the pins attracted by the electromagnet
b. the dry cell as the source of electricity d. the nail as the core
5. What happens when a part of an electromagnet is disconnected?
o. It loses its magnetism.​