physics exam 2 ch:27

What can you conclude about the x-component of the magnetic

field at the particle’s position?

A. (Bx > 0)

When a charged particle moves through a magnetic field, the

direction of the magnetic force on the particle at a certain point is

C. perpendicular to the magnetic field at that point.

A charged particle is moving with speed v perpendicular to a uniform magnetic

field. A second identical charged particle is moving with speed 2v perpendicular to

the same magnetic field. If the frequency of revolution of the first particle is f, the

frequency of revolution of the second particle is

f

A circular coil has radius r=0.05 m

with 30 turns of wire. It carries a

counterclockwise current of 5 A.

The coil is in a uniform 1.20-T

magnetic field directed to the right.

Find the magnitudes of a) magnetic

moment and b) torque on the coil.

how much work id the magnetic field doing?

the direction of the magnetic field in this region points in the direction of the

B) -z-axis

What is the magnetic force on the particle?

A beam of electrons (which have negative charge q)

is coming straight toward you. You put the north

pole of a magnet directly above the beam. The

magnetic field from the magnet points straight

down. Which way will the electron beam deflect?

left

if the charge is paralle to B

A vertical wire carries a current straight down. To the east of this wire, the magnetic field points

toward the south.

A current carrying loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense.

For points OUTSIDE the loop, the magnetic field caused by this current

points straight down.

A current carrying loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense.

For points INSIDE the loop, the magnetic field caused by this current

points straight up.

A horizontal wire carries a current straight toward you. From your point of view, the magnetic field at a point directly below the wire points

to the right.

What is the magnitude of the force that the Earth's magnetic field exerts on the electron?

2.3×10^-18 N

1.1 m

What is the direction of the minimum magnetic field?

east