Electromagnetism TCAP Review Draw an electromagnet and label

Electromagnetism TCAP Review

Draw an electromagnet and label its parts.

What are domains? Explain their arrangement within a magnet.

Consider an electromagnet that uses an iron nail as its core. Which of the following would most likely reduce the strength of the magnetic field of the electromagnet? A. Increasing the number of loops of wire per meter of coil. B. Replacing the battery with a new battery of higher voltage. C. Tightening the attachment of wires to the battery. D. Replacing the iron nail with a wooden rod.

What is a similarity between a bar magnet’s magnetic field and the Earth’s magnetic field?

Name two differences between Earth’s and a bar magnet’s magnetic field.

What is the strongest part of a bar magnet’s magnetic field? Explain how you know.

What is the weakest part of a bar magnet’s magnetic field? Explain.

A B If A and B were attached to a D battery of equal voltage, which would be able to pick up more magnets? • A. A, because it has more coils which increases the strength. • B. B, because it has more coils which increases the strength. • C. A, because it has more voltage which increases the strength. • D. B, because it has more voltage which increases the strength.

What three materials are magnetic?

What is electromagnetic induction?

What type of current is produced through electromagnetic induction?

Name 2 ways to increase the strength.

How can you produce a current?

Would you need an open or closed circuit to produce electricity? Explain.

What is the difference between an independent and dependent variable?

• Stella thinks that if people are exposed to ultraviolet light then they are more likely to get skin cancer. Stella designs an experiment wherein sample A consisted of people were exposed to ultraviolet light and sample B was not. • Control group • Independent variable – • Dependent variable -

• Becky wanted to figure out what type of liquid worked best for growing beans. She watered one with coca-cola, one with lemonade, and one with just water. After one week, she measured how high they had grown. • Control • Independent variable • Dependent variable-

Which would produce electricity? Explain.

• Which of the following best describes a solenoid? • A. A coil of wire that induces a magnetic field from an electric current. • B. The iron core that produces a magnetic field due to its alignment of domains. • C. A device that is able to convert mechanical energy into electrical energy. • D. A tool that can be used to measure the amount of electric current.

Which of the following is the most accurate comparison between electromagnetism and ferromagnetism? • A. Magnets that display electromagnetism are temporary while magnets that display ferromagnetism are permanent. • B. Magnets that display electromagnetism are permanent while magnets that display ferromagnetism are temporary. • C. Magnets that display electromagnetism and magnets that display ferromagnetism are always considered temporary magnets. • D. Magnets that display electromagnetism and magnets that display ferromagnetism are always considered permanent magnets.

Imagine that a student has constructed an electromagnet. The student connected a wire to two ends of a battery and wrapped the wire around an iron core. Which of the following would best describe what would happen if the wire disconnected from one of the ends of the battery? • A. The circuit would become closed; therefore, the current would no longer flow through the wire, which would cause the iron core to lose its magnetism. • B. The circuit would remain closed; therefore, the current would continue to flow through the wire, which would allow the iron core to maintain its magnetism. • C. The circuit would become open; therefore, the current would no longer flow through the wire, which would cause the iron core to lose its magnetism. • D. The circuit would remain open; therefore, the current would continue to flow through the wire, which would allow the iron core to maintain its magnetism.

What are the 3 ways to demagnetize a magnet?

Jose has two bar magnets. He pushes the ends of the two magnets together and then he lets them go. The magnets move quickly apart. Which of the following statements best explains why this happens? • A. Magnets always repel each other. • B. The north poles of the magnets are facing each other. • C. The second magnet released a large amount of mechanical energy. • D. The north pole of one magnet is facing the south pole of another magnet.