Electromagnetism

What happens when an electric current flows through a wire?

• The wire begins to spin.

• Nothing happens.

• A field of gravity is created around the wire.

• A magnetic field is created around the wire.

What does this image show?

• Parallel circuit

• Series circuit

• Magnet

• Electromagnet

How do you increase the strength of an electromagnet?

• Add a motor and/or light bulbs

• Add more light bulbs and wire coils

• Add more wire coils

• Increase the voltage

What is/are the difference(s) between a magnet and an electromagnet?

• An electromagnet can be turned on/off.

• A magnet can be turned off.

• An electromagnet is stronger.

A _______________ is a current-carrying coil of wire with many loops.

• magnet

• electromagnet

• solenoid

• compass

How can a magnet be used to produce an electric current?

• Hold a magnet next to a piece of wire.

• Wrap wire around a magnet.

• Spin the magnet around inside a coil of wire.

A _____________ transforms mechanical energy into electrical energy.

• generator

• electromagnet

• circuit

• magnetic field

Increasing the number of coils in an electromagnet will _________ the power of the magnet.

• decrease

• increase

• not affect

Tags

NGSS.MS-PS2-5

What three minerals are attracted to a magnet?

• Gold, copper, cobalt

• Cobalt, aluminum, silver

• Iron, copper, aluminum

• Iron, nickel, cobalt

What is true about electricity and magnetic fields?

• Electricity is needed to create any magnet.
• Electricity always creates a magnetic field.
• Electricity is stronger than a magnetic field.
• Electricity prevents magnetic fields from occurring.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5