Author Question: A beam of electrons is accelerated through a potential difference of 10 kV before entering a ... (Read 40 times)

appyboo · **on:** Jul 29, 2018

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