Group Activity: Charge Moving in Magnetic Fields

What happens to a charged particle when it enters a magnetic field at a right angle to the field lines?

• a) It accelerates along the field lines.

• b) It experiences no force.

• c) It follows a curved path perpendicular to the field lines.

• d) It moves in a straight line along the field lines.

The direction of the magnetic force on a positive charge moving in a magnetic field is:

• a) In the direction of the magnetic field.

• b) Opposite to the direction of the magnetic field.

• c) Perpendicular to both the velocity and the magnetic field.

• d) Parallel to the velocity of the charge.

What is the SI unit of magnetic field strength (magnetic induction)?

• a) Tesla (T)

• b) Weber (Wb)

• c) Gauss (G)

• d) Henry (H)

A charged particle moving parallel to a magnetic field will experience what kind of force?

• a) No force.

• b) A force perpendicular to the magnetic field.

• c) A force parallel to the magnetic field.

• d) A force in the direction opposite to the magnetic field.

When is the magnetic force on a charged particle the greatest?

• a) When the velocity of the particle is zero.

• b) When the velocity is parallel to the magnetic field.

• c) When the velocity is perpendicular to the magnetic field.

• d) When the particle's charge is zero.

Which of the following particles is least affected by a magnetic field in terms of the magnitude of the force experienced?

• a) Electron

• b) Proton

• c) Neutron

• d) Alpha particle

What is the relationship between the radius of the circular path followed by a charged particle in a magnetic field and its velocity?

• a) The radius is directly proportional to the velocity.

• b) The radius is inversely proportional to the velocity.

• c) There is no relationship between the radius and velocity.

• d) The radius is proportional to the square of the velocity.

In which of the following situations will a charged particle experience the maximum magnetic force?

• a) Highest charge, highest velocity, and smallest mass.

• b) Highest charge, lowest velocity, and largest mass.

• c) Lowest charge, highest velocity, and smallest mass.

• d) Lowest charge, lowest velocity, and largest mass.

What is the direction of the magnetic force on an electron moving northward in a magnetic field pointing eastward?

• a) Upward

• b) Downward

• c) Westward

• d) Southward

A charged particle with a positive charge moves to the left in a magnetic field directed into the plane of the paper. What is the direction of the magnetic force?

• a) Upward

• b) Downward

• c) Out of the plane of the paper

• d) Into the plane of the paper