Question

[A particle with charge 6.40×10⁻¹⁹ 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.]

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 1.60×10⁻¹⁸ J . In what direction and through what potential difference Vb−Va does the particle move?

Choices:

a. The particle moves to the left through a potential difference of Vb−Va=Vb−Va= 2.50 V .

b. The particle moves to the left through a potential difference of Vb−Va=Vb−Va= -2.50 V

c. The particle moves to the right through a potential difference of Vb−Va=Vb−Va= 2.50 V .

d. The particle moves to the right through a potential difference of Vb−Va=Vb−Va= -2.50 V .

e. The particle moves to the left through a potential difference of Vb−Va=Vb−Va= 25.0 V .

f. The particle moves to the right through a potential difference of Vb−Va=Vb−Va= -25.0 V .

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

Answer 1

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