1. In a velocity selector, we have an magnetic field (0.004 Tesla) directed into the page. We want electrons to travel to the right at a constant velocity, 55 kilometeres per second. Determine the direction of the required electric field.

a. to bottom of page
b. to top of page
c. to the left
d. out of the page
e. into the page

2. In a velocity selector, we have an magnetic field (0.004 Tesla) directed into the page. We want electrons to travel to the right at a constant velocity, 55 kilometeres per second. Calculate the magnitude of the required electric field.

a. 14 V/m
b. 7.3 E-7 V/m
c. 1.4 E6 V/m
d. 16 V/m
e. 22 V/m

Need work to back up answer.