Question

1) An electron passes through a point 3.15 cm from a long straight wire as it moves at 33.9% of the speed of light perpendicularly toward the wire. The wire carries a current of 18.9 A. Find the magnitude of the electron's acceleration at that point.

acceleration:____________ m/s2

2) A beam of protons is directed in a straight line along the positive ?‑direction through a region of space in which there are crossed electric and magnetic fields. If the electric field magnitude is ?=430 V/m in the negative ?‑direction and the protons move at a constant speed of ?=9.1×105 m/s, what must the direction and magnitude of the magnetic field be in order for the beam of protons to continue undeflected along its straight-line trajectory?

Select the direction of the magnetic field ?

a) positive y‑direction

b) negative ?‑direction

c) negative ?‑direction

d)positive ?‑direction

e) negative ?‑direction

f) positive ?‑direction

Magnitude of the magnetic field ? :________________T

Answer 1