CHAPTER 6.2 MAGNETIC FORCE

What happens when two north poles of a magnet are placed together?

• they repel

• they attract

• they cancel each other out

• the strength of the magnet is doubled

•In the picture of the magnets, what do you predict will happen?

• they will attract

• they will repel

A vertical wire carrying a current in the upward direction is placed in a horizontal magnetic field directed towards north. The wire will experience a force directed towards

• east

• west

• north

• south

The diagram shows a current-carrying wire in a horizontal magnetic field.

Which arrow shows the direction of the force experienced by the wire?

• A

• B

• C

• D

A current-carrying wire of length 50 cm is

positioned perpendicular to a uniform magnetic field.

If the current is 10.0 A and it is determined that there

is a resultant force of 3.0 N on the wire due to the

interaction of the current and field, what is the

magnetic field strength?

• 6.7 E -3 T

• 1.8 E -3 T

• 0.6 T

• 1.5 T

A 2.0 m wire segment carrying a current of

0.60 A oriented parallel to a uniform magnetic field of

0.50 T experiences a force of what magnitude?

• 0

• 0.15 N

• 0.30 N

• 6.7 N

A wire is lying horizontally in the north-south

direction and the horizontal magnetic field is toward

the east. Some positive charges in the wire move

north and an equal number of negative charges move

south. The direction of the force on the wire will

• EAST

• WEST

• INTO THE PAGE

• OUT OF THE PAGE

A negatively charged particle is moving to the

right, directly above a wire having a current flowing

to the right, as shown in the figure. In which direction

is the magnetic force exerted on the particle?

• into the page

• out of the page

• downward

• upward

A beam of positively charged alpha particles

enters the magnetic field between the poles of a

magnet.

In which direction is the magnetic force on the beam?

• Down the page

• Into the page

• Up the page

• Out of the page

A current carrying wire lies between the poles of

two magnets, as shown. What is the direction of the force on the wire?

• Into the plane of the paper

• Out of the plane of the paper

• Towards the N-pole

• To the right