The potential difference between points and is 12 V. The The figure to the right

Question

The potential difference between points and is 12 V.

The The figure to the right shows a uniform (constant) electric field between oppositely charged plates, as seen from the side. The potential difference Vba between points a and b is 12 V. If the distance between points a and b is 8.0 cm, and the distance between points b and c is 5.0 cm, what is the potential difference Vca between points a and c? An electron initially at rest is accelerated from point a to point b by a potential difference Vba. How much greater would be its final speed be if it were accelerated from point a to point b by twice as much voltage? Hint: The work-energy principle may be handy here.

Explanation / Answer

since same distance across plates 12 V and bc distance is perp to field

b) W = dPE
1/2 mv^2 = e V

so double V will double v

so v would be sqrt(2) = 0.707 as big

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.