Electricity and Magnetism

The diagram shows a coiled wire that carries an electrical current. What do the arrows represent?

• the magnetic field

• thermal energy

• light energy

• the electric field

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Georgia moves an unattached piece of wire back and forth over a magnet. Which best explains what will happen?

• A current will be induced because the wire moves through a magnetic field.

• A current will not be induced because the wire moves through a magnetic field.

• A current will be induced because the wire is not part of a closed circuit.

• A current will not be induced because the wire is not part of a closed circuit.

Tags

NGSS.HS-PS2-5

Frances drew a diagram to show electromagnetic induction.

Which label belongs in the area marked X?

• Current

• Magnetic field

• Solenoid

• Force on wire

Tags

NGSS.HS-PS2-5

What happens to an iron bar when it is placed within the coils of a solenoid?

• It induces a current.

• It stops the current.

• It becomes a magnet.

• It loses its magnetism.

An object that is made of which material is likely to be attracted to a magnet?

• nitrogen

• nickel

• paper

• plastic

Tags

NGSS.MS-PS2-3

A bar magnet is cut in half, as shown.

• 
• 
• 
• 

How are the magnetic field lines near the south pole of a magnet affected when a second south pole is brought near it?

• The field lines combine with the lines around the second south pole.

• The field lines overlap with the lines from the second south pole.

• The field lines bend toward the second south pole.

• The field lines bend away from the second south pole.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which statement correctly describes Earth’s magnetic field?

• A compass can lead a hiker to the geographic North Pole.

• The magnetic pole near the South Pole is a north pole.

• Compasses point toward a magnetic pole that is a north pole.

• Field lines circle Earth from east to west.

Which will a positively charged object attract?

• an object that has a negative charge

• an object that has a smaller positive charge

• an object that has no charge

• an object that has a larger positive charge

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Tisa makes a diagram to organize her notes about charging objects. Which statement should she place in the region marked X?

• Electrons move between objects.

• The objects do not touch.

• The objects develop opposite charges.

• The objects have the same charge.

Tags

NGSS.MS-PS2-3