Magnetic Force on Charged Particles

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

• Out of the page

• Up the page

An electron which moves with a speed of 30000 m/s parallel to a uniform magnetic field of 0.40 T experiences a force of what magnitude?

• 0

• 2.2 E -24

• 1.9 E -15

• 4.8 E -14

The force on a charged particle created by its motion in a magnetic field is maximum at what angle between the particle velocity and field?

• 0

• 45

• 90

• 180

The diagram shows a beam of electrons entering a magnetic field. What is the effect of the magnetic field on the electrons?

• They are deflected into the plane of the

  diagram

• They are deflected out of the plane of the

  diagram

• They are deflected towards the bottom of

  the diagram

• They are deflected towards the top of the

  diagram.

A stationary positive charge +Q is located in a magnetic field B, which is directed toward the right as indicated. Which of the following is true regarding the direction of the magnetic force on Q?

• right

• left

• up

• no force

The diagram shows a beam of electrons entering a magnetic field. The direction of the magnetic field is out of the page. In what direction does the deflection of the electrons occur?

• Into the page

• Out of the page

• Towards the bottom of the page

• Towards the top of the page

Three particles travel through a region of space

where the magnetic field is out of the page, as shown in the figure. The electric charge of each of the three particles is, respectively.

• 1 is neutral, 2 is negative, and 3 is

  positive

• 1 is neutral, 2 is positive, and 3 is

  negative

• 1 is positive, 2 is negative, and 3 is

  neutral

• 1 is negative, 2 is neutral, and 3 is

  positive