Magnetism and Electricity Review

Which of the following are ferromagnetic elements?

• nickel
• iron
• cobalt
• all of the above

Tags

NGSS.MS-PS2-3

When you break an iron magnet into two pieces, you get ____.

• two north poles and two south poles
• two south poles
• two north poles
• a piece of iron that is no longer magnetic

What makes an electric motor spin?

• The permanent magnet and the electromagnet have no effect on the spinning of the motor.

• The permanent magnet and the electromagnet continuously attract and repel each other.

• The permanent magnet and the electromagnet continuously repel each other.

• The permanent magnet and the electromagnet continuously attract each other.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Two objects will attract one another when they have ____.

• like charges
• no charge
• opposite charges
• the same amount of charge

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

• domain
• pole
• field
• generator

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Unlike poles of a magnet ____________________.

• attract
• repel
• cancel each other out

Tags

NGSS.MS-PS2-3

An electric motor converts electrical energy into ____________________.

• magnetism
• motion
• gravity
• friction

Tags

NGSS.MS-PS3-5

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

• increases
• decreases
• reverses
• stays the same

Tags

NGSS.MS-PS2-3

Which statement is false?

• The direction a coil of wire moves through a magnetic field determines the direction of the electric current.

• The direction a magnet moves through a coil of wire determines the direction of the electric current.

• Current will not flow though a wire if the magnet is outside the coil.

• Current will flow through a wire as long as the magnetic field around the coil s changing.

Tags

NGSS.HS-PS2-5

The field of a magnet is weakest at its poles.

• true
• false