A beam of electrons is accelerated through a potential difference ...

[appyboo]

A beam of electrons is accelerated through a potential difference of 10 kV before entering a velocity selector.
 
  If the B-field of the velocity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?
  A)
 
  2.3  103 V/m
  B)
 
  7.9  103 V/m
  C)
 
  5.9  105 V/m
  D)
 
  6.0  105 V/m
  E)
 
  7.2  106 V/m

Question 2

A proton is accelerated from rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it follows.
 
  A)
 
  1.1 mm
  B)
 
  1.1 cm
  C)
 
  11 cm
  D)
 
  1.1 m
  E)
 
  11 m

[ttt030911]

Answer to Question 1

C

Answer to Question 2

B

[appyboo]

Thanks for the timely response, appreciate it

[alvinum]

Gracias!