Electricity and Electromagnets

A flowing electric current creates a magnetic field.

• True

• False

Tags

NGSS.MS-PS2-5

Opposites ________________, likes _______________. 

• attract, repel

• repel, attract

Tags

NGSS.MS-PS2-3

An electromagnet can be created by wrapping a wire around a nail and attaching two ends of the wire to a battery. What happens in an electromagnet?

• Electrical energy transforms into mechanical energy.

• Electrical energy produces a magnetic field.

• Mechanical energy transforms into electrical energy.

When you add more coils to an electromagnet, what happens to its strength?

• It stays the same

• It decreases

• It increases

Tags

NGSS.MS-PS2-3

Many everyday objects rely on electromagnets to work. 

• True

• False

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Electromagnets =

• Magnetic field only

• Electricity + magnet

• Electric Current only

Looking at the electromagnet pictured, will it pick up paper clips in its current state?

• No, the circuit is currently open so there will be no magnetic field.

• Yes, the circuit is closed so electric current will create a magnetic field.

• No, a nail is not considered a magnet.

• Yes, the nail has magnetic properties on its own.

Tags

NGSS.MS-PS2-3

Which statement BEST explains how energy changes to make the fan spin?

• Electrical energy changes to heat energy.

• Wind energy changes to electrical energy.

• Heat energy changes to mechanical energy.

• Electrical energy changes to mechanical energy.

Which of the following is a device that converts electrical energy into mechanical energy?

• simple electric motor

• generator

• magnet

Which of the following is a device that converts mechanical energy into electrical energy?

• simple electric motor

• generator

• magnet

Tags

NGSS.MS-PS3-5