Main Menu connect PHYSICS HOMEWORK 1 Question 22 (of 26) 22. Assistance A horizo

Question

Main Menu connect PHYSICS HOMEWORK 1 Question 22 (of 26) 22. Assistance A horizontal beam of electrons initially moving at 3.0 x 10' m/s is deflected vertically by the vertical electric field between oppositely charged parallel plates. The magnitude of the field is 1.7 x 10 NiC. (a) What is the direction of the field between the plates? (b) What is the charge per unit area on the plates? (e) What is the vertical deflection d of the electrons as they leave the plates? Report a P 2.0 cm () The electric field is directed from the top plate to the bottorm- plate. 3.

Explanation / Answer

(a) Negative particles accelerate AGAINST an electric field. The electrons are accelerating upward, therefore the field points DOWN.

(b) = o*E = 8.852e-12C²/N·m² * 1.7e4N/C = 1.5e-7 C/m²

(c) time to cross t = d / v = 0.02m / 3e7m/s = 6.67e-10 s
acceleration a = force / mass = q*E / m
a = 1.602e-19C * 1.7e4N/C / 9.11e-31kg = 2.99e15 m/s²

so deflection d = ½at² = ½ * 2.99e15m/s² * (6.67e-10s)² = 6.65e-5 m = 0.0665 mm

Related Questions

Navigate

• Browse (All)
• Browse M
• Subjects

---

---

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