Magnetic Fields

A wire carries a current, creating a magnetic field around itself as shown. The current in the wire is:

• Directed to the right

• Directed to the left

• Equal to the magnetic field

• In the same direction as the magnetic field

Tags

NGSS.HS-PS2-5

The strongest part of a magnet is...

• the bars .

• the force field.

• the poles.

• the middle.

Tags

NGSS.MS-PS2-3

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

The SI unit of magnetic field is

• weber

• gauss

• tesla

• farad

What does the following represent?
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙

• A crowd with binoculars
• A bunch of coaxial cables 
• Uniform magnetic field directed into the screen away from you
• Uniform magnetic field directed out of your screen at you

Tags

NGSS.HS-PS3-5

Electrical currents do NOT create a magnetic field.

• True
• False

Tags

NGSS.HS-PS2-5

In the magnetic field equation, what is the variable B?

• radius
• permeability
• current
• magnetic field

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

In the magnetic field equation, what is the variable μ?

• magnetic field
• current
• permeability
• radius

The magnetic field is inversely proportional to the radius.

• True
• False

The magnetic field is proportional to the current.

• True
• False

Tags

NGSS.HS-PS2-5