6.7.1.1 - 6.7.21 Electromagnetism

What are the components of an electromagnet?

• Wire and an iron core.
• Wire and a magnetic compass.
• Wire and a solenoid.
• Wire and a bar magnet.

What is the purpose of an electromagnet?

• To repel electric currents.
• To generate magnetic fields.
• To repel magnetic fields.
• To create electric currents.

What is the purpose of electromagnetic induction in transformers?

• To generate magnetic fields.
• To change the voltage of alternating currents.
• To create electric currents.
• To repel magnetic fields.

Which device uses an electromagnet?

• A toaster.
• An electric bell.
• A blender.
• A vacuum cleaner.

How are electric currents and magnetic fields related?

• Electric currents create magnetic fields.
• Electric currents and magnetic fields repel each other.
• Magnetic fields create electric currents.
• Electric currents and magnetic fields are unrelated.

What is the shape and strength of the magnetic field inside a solenoid?

• The magnetic field inside a solenoid is weak and irregular.
• The magnetic field inside a solenoid is strong and irregular.
• The magnetic field inside a solenoid is strong and uniform.
• The magnetic field inside a solenoid is weak and uniform.

What is the relationship between electric currents and magnetic fields?

• Electric currents create magnetic fields.
• Electric currents and magnetic fields are unrelated.
• Electric currents and magnetic fields repel each other.
• Magnetic fields create electric currents.