A 500-eV electron and a 300-eV electron trapped in a uniform ...

[a0266361136]

A 500-eV electron and a 300-eV electron trapped in a uniform magnetic field move in circular paths in a plane perpendicular to the magnetic field. What is the ratio of the radii of their orbits?
 a. 2.8
  b. 1.7
  c. 1.3
  d. 4.0
  e. 1.0

Question 2

A deuteron is accelerated from rest through a 10-kV potential difference and then moves perpendicularly to a uniform magnetic field with B = 1.6 T. What is the radius of the resulting circular path? (deuteron: m = 3.3  10-27 kg, q = 1.6  10-19 C)
 a. 19 mm
  b. 13 mm
  c. 20 mm
  d. 10 mm
  e. 9.0 mm

[macybarnes]

Answer to Question 1

C

Answer to Question 2

B