Electric Currents and Magnetic Fields

The coil of wire shown has current running in it along the directions shown by the arrows. The magnetic field lines in the coil point ---.

• down

• up

• away from the coil

• clockwise around the coil

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

When running a current through a wire, what do the blue lines represent?

• The wire spinning

• A magnetic field that was created

• Electrons leaving

• Electricity

Tags

NGSS.HS-PS2-5

A coil of wire with an electric current in it is called a(n)

• A. transformer.
• B. electric generator.
• C. electric motor.
• D. solenoid.

Tags

NGSS.HS-PS2-5

The coil shown has current running through the wire, and it creates a magnetic field shown by the arrows. The current in the coil must run ---.

• from A to B

• from B to A

• The current in the coil cannot make a magnetic field like the one shown.

Tags

NGSS.HS-PS2-5

The wire shown carries a current that makes a magnetic field in the space around it. The current in the wire must be running ---.

• to the left

• to the right

• straight out of the page

• This magnetic field cannot be made by a current.

Tags

NGSS.HS-PS2-5

If you wrap more coils around an electromagnet, it will become 

• brighter
• stronger
• weaker
• invisible

Tags

NGSS.HS-PS2-5

A straight wire is carrying a current as shown. Which of these shows the magnetic field lines around this wire?

• 
• 
• 
• 

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Suppose you are looking down the axis of a coil of wire carrying a current, and the magnetic field inside the coil is as shown. The current in this coil must be running ---.

• from A to B

• from B to A

• into both A and B and leaving somewhere not shown

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

If a current runs through the coil from A to B, the bar magnet will ---.

• be attracted to the coil

• be repelled from the coil

• spin counterclockwise

• feel a force directed up the screen

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Are the magnetic field lines in the picture correct?

• Yes, because they point from north to south.
• No, because they point from north to south (they're supposed to go the other way).
• Yes, because the North pole is on the left in all pictures.
• No, because the North pole is on the left in all pictures (it's supposed to be on the right).

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5