8th grade semester test - spring 2025

As the amount of charge on either of two charged objects increases, the electric force between the objects decreases.

• True

• False

Tags

NGSS.MS-PS2-3

Two objects will experience an electric force of attraction when they have (a)   .

• like charges

• opposite charges

• the same amount of charge

• no charge

If the distance between two charged objects increases, the electric force between them (a)   .

• decreases

• increases

• remains the same

• stops

Tags

NGSS.MS-PS2-3

Which of the following statements about the forces between charged objects is not true?

• As the distance between charged objects decreases, the electric force between them decreases.

• If one object is positively charged and another is negatively charged, the objects will attract each other.

• Two negatively charged objects will repel each other.

• As the amount of charge on either object decreases, the electric force between them decreases.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

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

• True

• False

Tags

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

A current-carrying wire produces a magnetic field.

• True

• False

Tags

NGSS.HS-PS2-5

The strength of an electromagnet can be increased by reducing the number of turns on the wire coil so that more current can flow.

• True

• False

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

As a nail approaches the south pole of a magnet, what happens to its magnetic domains?

• The north poles of the domains point toward the magnet.

• The south poles of the domains point toward the magnet.

• The domains spin, but end up in no particular pattern.

• The domains remain unaffected by the magnet.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5