An electron in a Cathode-Ray Television Tube moves toward the front of the tube with a speed of 8.0 x 10®m/s along the x axis (pictured below). Surrounding the neck of the tube are coils of wire that create a magnetic field of magnitude 0.025 T, directed at an angle of 60° to the x axis and lying in the xy plane. Calculate the magnitude and direction of the magnetic force felt by the electron.

A proton is accelerated in a particle accelerator from rest through a potential difference of 0.130 kV. If the proton then passes through a uniform magnetic field of magnitude 0.120 T that is perpendicular to the proton's path, what is the radius of the path that the proton will take through the magnetic field? Give your answer in cm. (The mass of a proton is 1.672*10^-27 kg.)

A particle with positive charge q = 3.52 x 1018 C moves with a velocity v = (5î + 4ĵ – k) m/s through a region where both a uniform magnetic field and a uniform electric field exist. (a) Calculate the total force on the moving particle, taking B = (3î + 2ĵ + k) T and E = (3î - j - 2k) V/m. (Give your answers in N for each component.) Ey = Ey = F, = (b) What angle does the force vector make with the positive x-axis? (Give your answer in degrees counterclockwise from the +x-axis.) ° counterclockwise from the +x-axis (c) What If? For what vector electric field would the total force on the particle be zero? (Give your answers in V/m for each component.) E, = V/m E, = V/m E, = V/m

The earth's magnetic field is about 45 micro Tesla (μT) and points approximately due north. What is the force exerted by the field on a particle with a charge of 3.0 μC that is moving due west at a speed of 250 m/s? What is the direction of the force on the particle (i.e. north, south, east, west, up or down)?