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5. An oil droplet is sprayed into a uniform electric field of adjustable magnitude. The 0.04 g droplet hovers motionless (Fnet = Fg - FE= 0) when the electric field is set to 370 N/C and directed downwards. a. Determine the sign and magnitude of the charge on the oil droplet. [T4] b. Determine the approximate number of excess electrons that are on the oil droplet. [T2]

5. An oil droplet is sprayed into a uniform electric field of adjustable magnitude. The 0.04 g droplet hovers motionless (Fnet = Fg - FE= 0) when the electric field is set to 370 N/C and directed downwards. a. Determine the sign and magnitude of the charge on the oil droplet. [T4] b. Determine the approximate number of excess electrons that are on the oil droplet. [T2]

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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1. Two electrons are separated by an extremely large distance. They approach each other with initial speeds of 3.51 x 10 m/s each. Calculate the separation between the electrons when they are closest to each other. [A5] 2. Ernest Rutherford used alpha particles (charge +2e) and thin gold foil to probe the structure of the atom. Given that the nucleus of a gold atom has 79 protons, calculate the electrostatic repulsive force between the alpha particle and the gold nucleus when the separation distance between the two is 6.2 x 10-¹4 m. [A4] 3. Two protons start at rest with a separation of 6.8 x 10-11 m. Once released, the protons accelerate away from each other. Calculate the speed of each protons when they are a very large distance apart. [A5] 4. Four parallel plates are connected in a vacuum as shown below. A proton at rest in the hole of plate A is accelerated to the right. The proton passes through the holes at B and C with no acceleration at all. It then passes through the hole at C and slows down as it heads to plate D. 4.0 cm 4.0 cm 4.0 cm A C D 5.2 X 10² V 3.1 X 10³ V a) Calculate the speed of the proton at the hole B. [T4] b) Calculate the distance (in centimetres), how far the proton would be when it changes directions. State the direction with respect to plate D. [T4] 5. An oil droplet is sprayed into a uniform electric field of adjustable magnitude. The 0.04 g droplet hovers motionless (Fnet = Fg - FE = 0) when the electric field is set to 370 N/C and directed downwards. a. Determine the sign and magnitude of the charge on the oil droplet. [T4] b. Determine the approximate number of excess electrons that are on the oil droplet. [T2] B
Transcribed Image Text:1. Two electrons are separated by an extremely large distance. They approach each other with initial speeds of 3.51 x 10 m/s each. Calculate the separation between the electrons when they are closest to each other. [A5] 2. Ernest Rutherford used alpha particles (charge +2e) and thin gold foil to probe the structure of the atom. Given that the nucleus of a gold atom has 79 protons, calculate the electrostatic repulsive force between the alpha particle and the gold nucleus when the separation distance between the two is 6.2 x 10-¹4 m. [A4] 3. Two protons start at rest with a separation of 6.8 x 10-11 m. Once released, the protons accelerate away from each other. Calculate the speed of each protons when they are a very large distance apart. [A5] 4. Four parallel plates are connected in a vacuum as shown below. A proton at rest in the hole of plate A is accelerated to the right. The proton passes through the holes at B and C with no acceleration at all. It then passes through the hole at C and slows down as it heads to plate D. 4.0 cm 4.0 cm 4.0 cm A C D 5.2 X 10² V 3.1 X 10³ V a) Calculate the speed of the proton at the hole B. [T4] b) Calculate the distance (in centimetres), how far the proton would be when it changes directions. State the direction with respect to plate D. [T4] 5. An oil droplet is sprayed into a uniform electric field of adjustable magnitude. The 0.04 g droplet hovers motionless (Fnet = Fg - FE = 0) when the electric field is set to 370 N/C and directed downwards. a. Determine the sign and magnitude of the charge on the oil droplet. [T4] b. Determine the approximate number of excess electrons that are on the oil droplet. [T2] B
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