4.4 Magnetic Fields

What is the correct term for the 'B field'?

• The magnetic flux density. It is a scalar quantity

• The magnetic flux density. It is a vector quantity

• The magnetic field. It is a scalar quantity

• The magnetic field. It is a vector quantity

Match the equations with their use.

• Magnetic Flux density around a solenoid.

• Magnetic Flux density around a wire

• Force on a charged particle in a B field

• Force on wire in a B field

The strongest part of a magnet is...

• the bars .

• the force field.

• the poles.

• the middle.

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

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

In this image, matching north poles from two magnets are introduced.  What do you predict will be the outcome?

• There will be no interaction.  The poles of magnets do not have an effect on one another.
• The two north poles will attract each other
• The two north poles will repel each other
• The two magnets will combine and become one magnet

Looking at the field lines in this picture, these two magnets are ________

• Attracting

• Repelling

• Attracting and Repelling

• Doing nothing

Which rule do we use to predict the direction a current carrying wire will move in a magnetic field?

• Fleming's Left Hand Rule
• Fleming's Right Hand Rule
• Faraday's Left Hand Rule
• Faraday's Right Hand Rule

In Flemings Left hand rule what does the thumb point in the direction of?

• The direction of the magnetic field
• The direction of the current
• The direction of the force (movement)
• None of these