A charged particle (m = 5.0 g, q = 70 C) moves horizontally at a ...

[clippers!]

A charged particle (m = 5.0 g, q = 70 C) moves horizontally at a constant speed of 30 km/s in a region where the free fall gravitational acceleration is 9.8 m/s2 downward, the electric field is 700 N/C upward, and the magnetic field is perpendicular to the velocity of the particle. What is the magnitude of the magnetic field in this region?
 a. 47 mT
  b. zero
  c. 23 mT
  d. 35 mT
  e. 12 mT

Question 2

A charged particle moves in a region of uniform magnetic field along a helical path (radius = 5.0 cm, pitch = 12 cm, period = 5.0 ms). What is the speed of this particle as it moves along this path?
 a. 67 m/s
  b. 26 m/s
  c. 63 m/s
  d. 24 m/s
  e. 87 m/s

[epscape]

Answer to Question 1

a

Answer to Question 2

a

[clippers!]

Thanks for the timely response, appreciate it

[epscape]

Excellent