Author Question: A beam of electrons is sent in the positive x direction in a region with a uniform magnetic field B ... (Read 90 times)

Pineapplelove6 · **on:** Jul 28, 2018

A beam of electrons is sent in the positive x direction in a region with a uniform magnetic field B in the positive y direction and a uniform electric field E in the positive z direction. At which of the following speeds would the electrons be deflected in the positive z direction?
a. v = E/B
b. There is no speed for which this will happen.
c. v < E/B
d. v > E/B

Question 2

Spherical particles of density 2.0 g/cm3 are shaken in a container of water (viscosity = 1.0 10-3 Ns/m3). The water is 8.0 cm deep and is allowed to stand for 15 minutes. What is the greatest terminal velocity of the particles still in suspension at that time?
a. 0.55 10-5 m/s
c. 4.4 10-5 m/s
b. 1.1 10-5 m/s
d. 8.8 10-5 m/s