Concept Quiz: Magnetic Fields & Forces

Magnetic field lines are closet together at the __________.

• poles
• lines

Tags

NGSS.MS-PS2-3

Earth's magnetic poles are in the same place as the geographic poles.

• True
• False

A(n) __________ is a device that has a magnetized needle that can spin freely.

• Compass
• Magnetic Field

What does the following represent?

⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗

⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗

⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗

• Multiplied by a billion

• A piece of modern art

• Uniform magnetic field directed into the screen away from you

• Uniform magnetic field directed out of your screen at you

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

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

NGSS.HS-PS3-5

A straight wire carrying a 9.0 A current is in a uniform magnetic field oriented at right angles to the wire. When 75 cm of wire is in the field, the force on the wire is 1.2 N. What is the strength of the magnetic field (B)? HINT: F=I.L.B

• = 0.18 N
• = 0.18 T
• = 0.18 Cm
• = 0.18 

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

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.MS-PS2-3

NGSS.MS-PS2-5

The SI unit of magnetic field is

• weber

• gauss

• tesla

• farad

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

force on a conductor carrying a current = 1.32 N, current = 4 A, length = 3.88 m, magnetic flux density = ?

• 0.0851

• 1.17

• 0.317

• 0.106

magnetic flux density = 0.45 T, current = 1.37 A, length = 1.9 m, force on a conductor carrying a current = ?

• 0.0851

• 1.17

• 0.317

• 0.106