A particle with charge $8.00 \times 10^{-19}$ C is placed on the x axis in a region where the electric potential due to other charges increases in the +x direction but does not change in the y or z direction.
Part A
The particle, initially at rest, is acted upon only by the electric force and moves from point a to point b along the x axis, increasing its kinetic energy by $3.20 \times 10^{-19}$ J. In what direction and through what potential difference $V_b - V_a$ does the particle move?
The particle moves to the left through a potential difference of $V_b - V_a = 0.400$ V.
The particle moves to the left through a potential difference of $V_b - V_a = -0.400$ V
The particle moves to the right through a potential difference of $V_b - V_a = 0.400$ V.
The particle moves to the right through a potential difference of $V_b - V_a = -0.400$ V.
The particle moves to the left through a potential difference of $V_b - V_a = 4.00$ V.
The particle moves to the right through a potential difference of $V_b - V_a = -4.00$ V.
Part B
If the particle moves from point b to point c in the y direction, what is the change in its potential energy, $U_c - U_b$?
+3.20×10-19 J
-3.20×10-19 J
0
