8th: Electromagnetic Forces

Two objects will experience an electric force of attraction when they have ____.

• like charges

• opposite charges

Tags

NGSS.MS-PS2-3

If the distance between two charged objects increases, the electric force between them _____.

• increases

• decreases

Tags

NGSS.MS-PS2-3

The magnetic field is the area around a magnet where the magnetic force acts.

• True

• False

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

When you bring the south ends of two magnets close together, they repel each other.

• True

• False

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

The more loops in a coil of wire around the core of an electromagnet, the stronger the magnetic force.

• True

• False

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

When the amount of positive charge on an object equals the amount of negative charge on an object, the object is electrically neutral.

• True

• False

Which circuits will work?

• 
• 
• 
• 

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

What kind of magnet can be turned on and off?

• refrigerator magnet
• electromagnet

What is the flow of electricity?

• electric motor
• Electric current

An example of a conductor is :

• a glass paperweight
• a plastic cap
• a metal screw
• a wooden handle