1) An electron passes through a point 3.15 cm from a longstraight wire as it moves at 33.9% of the speed of lightperpendicularly toward the wire. The wire carries a current of 18.9A. Find the magnitude of the electron's acceleration at thatpoint.
acceleration:____________ m/s2
2) A beam of protons is directed in a straight line along thepositive ?‑direction through a region of space in which there arecrossed electric and magnetic fields. If the electric fieldmagnitude is ?=430 V/m in the negative ?‑direction and the protonsmove at a constant speed of ?=9.1×105 m/s, what must the directionand magnitude of the magnetic field be in order for the beam ofprotons to continue undeflected along its straight-linetrajectory?
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
