Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.

Lesson: Motion of a Charged Particle in a Magnetic Field

Worksheet: Motion of a Charged Particle in a Magnetic Field • 8 Questions

Q1:

A positive charge moves within regions containing magnetic fields, moving perpendicular to those fields. The moving charge is subject to magnetic forces, as shown in the cases (a), (b), and (c).

In what direction is the magnetic field aligned in case (a)?

  • Aup
  • Bout
  • Cin
  • Ddown
  • Eright

In what direction is the magnetic field aligned in case (b)?

  • Aup
  • Bout
  • Cleft
  • Ddown
  • Eright

In what direction is the magnetic field aligned in case (c)?

  • Aup
  • Bdown
  • Cout
  • Dright
  • Ein

Q2:

A negative charge moves within regions containing magnetic fields, moving perpendicular to those fields. The moving charge is subject to magnetic forces, as shown in the cases (a), (b), and (c).

In what direction does the negative charge move to produce the force on it that is shown in case (a)?

  • Ain
  • Bdown
  • Cright
  • Dleft
  • Eup

In what direction does the negative charge move to produce the force on it that is shown in case (b)?

  • Aout
  • Bright
  • Cin
  • Dleft
  • Edown

In what direction does the negative charge move to produce the force on it that is shown in case (c)?

  • Ain
  • Bright
  • Cdown
  • Dleft
  • Eup

Q3:

Two particles have the same linear momentum, but particle has four times the charge of particle . If both particles move in a plane perpendicular to a uniform magnetic field, what is the ratio of the radii of their circular orbits?

  • A
  • B
  • C
  • D
  • E

Q4:

A cosmic-ray electron moves at perpendicular to Earth’s magnetic field at an altitude where the field strength is . What is the radius of the circular path the electron follows? Electron mass is kg and electron charge is C.

Q5:

An ion has the same charge as an electron but a different mass. When moving in a magnetic field of magnitude T, the ion takes 2.0 ms to complete exactly eight revolutions. Find the mass of the ion.

  • A kg
  • B kg
  • C kg
  • D kg
  • E kg
Preview