Question

A particle with charge 1.60×10⁻¹⁹ 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.

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 1.44×10⁻¹⁸ J . In what direction and through what potential difference Vb−Va does the particle move?

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PartA

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 1.44×10⁻¹⁸ {\rm J} . In what direction and through what potential difference V_b-V_a does the particle move?

A The particle moves to the left through a potential difference of Vb−Va= 9.00 V .

B The particle moves to the left through a potential difference of Vb−Va= -9.00 V

C The particle moves to the right through a potential difference of Vb−Va= 9.00 V .

D The particle moves to the right through a potential difference of Vb−Va= -9.00 V .

E The particle moves to the left through a potential difference of Vb−Va= 90.0 V .

F The particle moves to the right through a potential difference of Vb−Va= -90.0 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, Uc−Ub ?

A + 1.44×10⁻¹⁸ J

B − 1.44×10⁻¹⁸ J

C 0

Answer 1