Electromagnets: Principles and Applications

Electromagnets: Principles and Applications

Read each question carefully and answer to the best of your ability. Show all your work where applicable.

Electromagnets are temporary magnets that get their magnetism from an electric current. Unlike permanent magnets, their magnetic field can be turned on and off, and its strength can be varied.

1. Which of the following materials is typically used as the core of an electromagnet?

2. What happens to the strength of an electromagnet if you increase the number of coils around its core?

1. Describe the basic components needed to create a simple electromagnet.

2. Explain two ways to increase the strength of an electromagnet.

1. An electromagnet is a type of magnet in which the magnetic field is produced by an electric  .

2. The magnetic field of an electromagnet can be turned   and  .

3. The direction of the magnetic field around a current-carrying wire can be determined using the   rule.

1. Electromagnets are permanent magnets.

2. Increasing the current flowing through the coil of an electromagnet will make it stronger.

Observe the diagram of an electromagnet below.

1. Based on the diagram and your knowledge, identify the core component labeled 'X' in a typical electromagnet.

2. Give an example of a real-world device that uses an electromagnet and explain its function.