The location of the strongest magnetic forces is the ____.

• electromagnets

• magnetic domains

• magnetic fields

• magnetic poles

Which diagram best represents a magnetic field between two magnetic fields?

• A

• B

• C

• D

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which of the following situations is NOT true for magnets?

• like poles repel each other

• unlike poles repel each other

• north poles repel each other

• A North pole and a South pole will attract each other

Electromagnetic induction is the process of producing an electric current by moving a loop of wire ____.

• through a magnetic field

• through a magnetic domain

• around an iron core

• around a magnetic pole

Tags

NGSS.HS-PS2-5

In the diagram below, a steel paper clip is attached to a string, which is attached to a table. The clip remains suspended beneath a magnet.

As the magnet is lifted, the paper clip begins to fall as a result of

• a decrease in the magnetic field strength near the clip.

• a decrease in the magnetic properties of the clip.

• an increase in the potential energy of the clip.

• an increase in the gravitational field strength near the magnet.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-5

The diagram below shows the magnetic field surrounding a bar magnet. The closer together the lines of force, the stronger the magnetic field. According to the diagram, where is the magnetic field the strongest?

• around the North pole

• around the South Pole

• around both poles

• in the center of the magnet

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which compass needle orientation in the figure above might correctly describe the magnet’s field at that point?

• a

• b

• c

• d

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A student wanted to find out how to make an electromagnet stronger. The results of his experiment are listed in the table below.

According to these data, which of the following does NOT make an electromagnet stronger?

• increasing the number of batteries that are connected

• increasing the number of wire turns around the core

• increasing the number of nails inside the core

• increasing the number of tacks used

Tags

NGSS.MS-PS2-3

The function of an electric motor is to change ____.

• chemical energy to electrical energy

• electrical energy to chemical energy

• electrical energy to mechanical energy

• mechanical energy to electrical energy

Tags

NGSS.HS-PS3-3

The function of a generator is to change ____.

• chemical energy to electrical energy

• electrical energy to chemical energy

• electrical energy to mechanical energy

• mechanical energy to electrical energy

Tags

NGSS.HS-PS3-3