8b Electromagnetism II

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Question 1 of 11

1. Question
1 point(s)
Which of the following materials is most likely to be used for the core of an electromagnet?
- Copper
- Steel
- Iron
- Silver
Correct

Incorrect
Question 2 of 11

2. Question
1 point(s)
Which diagram shows the magnetic field pattern associated with a solenoid carrying a current in the direction indicated?
- P and S only
- Q and R only
- P only
- Q only
Correct

Incorrect
Question 3 of 11

3. Question
1 point(s)
The figure shows a picture of a solenoid. State the magnetic pole at X when the switch is closed.
- North
- South
- Can be North or South, depends on the material of the core.
Correct

Incorrect
Question 4 of 11

4. Question
1 point(s)
The figure shows two solenoids are placed near each other. What will happen if the switches are switched on?
- The two solenoids will repel each other.
- The two solenoids will attract each other.
- The two solenoids will charge each other.
- The two solenoids will rotate.
Correct

Incorrect
Question 5 of 11

5. Question
1 point(s)
Which of the following methods can be used to increase the magnetic field strength of a solenoid?
- I. Increases the current.
- II. Increases the number of turns of wire of the solenoid.
- III. Places a soft iron core in the solenoid.
- IV. Use iron instead of copper as the wire of the solenoid.
Correct

Incorrect
Question 6 of 11

6. Question
1 point(s)
Which of the following statements is true regarding an electromagnet?
- I. Electromagnets generate an electric field around the conductor.
- II. Electromagnet is a permanent magnet.
- III. The strength of the magnetic field of an electromagnet can be adjusted easily.
- IV. An electromagnet can produce electromagnetic waves.
Correct

Incorrect
Question 7 of 11

7. Question
1 point(s)
Which of the following is not one of the uses of an electromagnet?
- Telephone earpiece
- Electromagnetic relay
- Circuit Breaker
- Microphone
Correct

Incorrect
Question 8 of 11

8. Question
1 point(s)
Which of the following is TRUE regarding an electric bell?
- It uses alternating current in its circuit
- It uses an electromagnet.
- It uses both permanent magnet and electromagnet
Correct

Incorrect
Question 9 of 11

9. Question
1 point(s)
Which of the design in the figure produces the strongest magnetic field if the current are equals in all cases? (The arrow shows the direction of the current.)
- P
- Q
- R
- S
Correct

Incorrect
Question 10 of 11

10. Question
1 point(s)
A direct current passes through a conductor will produce
- an electromagnetic wave.
- an electric field
- a magnetic field
- a gravitational field
Correct

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Question 11 of 11

11. Question
1 point(s)
The figure shows a lifting magnet. A lifting magnet is
- A permanent magnet
- An electromagnet
- A combination of a permanent magnet and an electromagnet.
Correct

Incorrect