An electron An electron (mass m = 9.11 times 10-31 kg) is accelerated from the r

Question

An electron

An electron (mass m = 9.11 times 10-31 kg) is accelerated from the rest in the uniform field E (E= 1.45 x 104 N/C) between two thin parallel charged plates. The separation of the plates is 1.20 cm . The electron is accelerated from rest near the negative plate and passes through a tiny hole in the positive plate, see the figure (Figure 1). With what speed does it leave the hole? Express your answer to three significant figures and include the appropriate units. This question will be shown after you complete previous question(s). $40 Direct labor per sweater

Explanation / Answer

F = ma = Eq

a = Eq/m = 1.45*10^4 * 1.6*10^-19 / (9.11*10^-31) = 2.5466 * 10^15 m/s^2

s = ut + 1/2*at^2

1.2*10^-2 = 0 + 0.5*2.5466*10^15*t^2

t^2 = 0.012 / (0.5*2.5466*10^15)

t = 3.07 *10^-9 s

v = 0 + 2.5466*10^15*3.07*10^-9 = 7.82*10^6 m/s

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

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