Three identical metal spheres are mounted on insulating stands. Initially, Sphere A has a net charge of -0.8 nC and Spheres B and C are uncharged. Sphere A is touched to Sphere B and removed. Then Sphere A is touched to Sphere C and removed. How many excess electrons or protons are left on Sphere A? O 2.5x10º excess protons O 1.25x10º excess electrons O 6.25x10® excess electrons O 6.25x10³ excess protons 2.5x10° excess electrons Correct Answer: 1.25x10º excess electrons

Three identical metal spheres are mounted on insulating stands. Initially, Sphere A has a net charge of -0.8 nC and Spheres B and C are uncharged. Sphere A is touched to Sphere B and removed. Then Sphere A is touched to Sphere C and removed. How many excess electrons or protons are left on Sphere A? O 2.5x10º excess protons O 1.25x10º excess electrons O 6.25x10® excess electrons O 6.25x10³ excess protons 2.5x10° excess electrons Correct Answer: 1.25x10º excess electrons

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter23: Electric Forces

Section: Chapter Questions

Problem 15PQ: A charge of 36.3 nC is transferred to a neutral copper ball of radius 4.35 cm. The ball is not...

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Similar questions

(a) Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. Silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) Imagine adding electrons to the pin until the negative charge has the very large value 1.00 mC. How many electrons are added for every 109 electrons already present?
A charge of 36.3 nC is transferred to a neutral copper ball of radius 4.35 cm. The ball is not grounded. The excess electrons spread uniformly on the surface of the ball. What is the number density (number of electrons per unit surface area) of excess electrons on the surface of the ball?
(i) A metallic sphere A of radius 1.00 cm is several centimeters away from a metallic spherical shell B of radius 2.00 cm. Charge 450 nC is placed on A, with no charge on B or anywhere nearby. Next, the two objects are joined by a long, thin, metallic wire (as shown in Fig. 25.19), and finally the wire is removed. How is the charge shared between A and B? (a) 0 on A. 450 nC on B (b) 90.0 nC on A and 360 nC on B, with equal surface charge densities (c) 150 nC on A and 300 nC on B (d) 225 nC on A and 225 nC on B (e) 450 nC on A and 0 on B (ii) A metallic sphere A of radius 1 cm with charge 450 nC hangs on an insulating thread inside an uncharged thin metallic spherical shell B of radius 2 cm. Next, A is made temporarily to touch the inner surface of B. How is the charge then shared between them? Choose from the same possibilities. Arnold Arons, the only physics teacher yet to have his picture on the cover ol Time magazine, suggested the idea for this question.
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M5
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Two identical metal spheres A and B are connected by a plastic rod. Both are initially neutral. 1.0 × 1012 electrons are added to sphere A, then the connecting rod is removed. Afterward, what are the charge of A and the charge of B?
An object of mass 5 × 10-6 g is placed over a thin positively charged sheet of surface density of charge σ = 4.0 × 10-6C/m2 (figure shown below). Estimate the charge that should be given to this object so that upon release it will not fall down. Calculate the number of electrons that is to be removed to give this charge. How much mass loss is caused by this removal of electrons?
A red blood cell typically carries an excess charge of about –2.5 x 10-12 C distributed uniformly over its surface. The red blood cells can be modeled as spheres approximately 6.6 µm in diameter and with a mass of 9.0 x 10-14 kg. How many excess electrons does a typical red blood cell have? excess electrons: electrons Does the mass of the extra electrons appreciably affect the mass of the cell? To find out, calculate the ratio of the mass of the extra electrons to the mass of the cell without the excess charge. ratio: What is the surface charge density on the red blood cell? Express your answer in units of C/m? and electrons/m2. surface change density: C/m? surface charge density: electrons/m2
A red blood cell typically carries an excess charge of about -2.5 × 10-12 C distributed uniformly over its surface. The red blood cells can be modeled as spheres approximately 7.6 µm in diameter and with a mass of 9.0 x 10-14 kg. How many excess electrons does a typical red blood cell have? excess electrons: electrons Does the mass of the extra electrons appreciably affect the mass of the cell? To find out, calculate the ratio of the mass of the extra electrons to the mass of the cell without the excess charge. ratio: What is the surface charge density on the red blood cell? Express your answer in units of C/m2 and electrons/m?. surface change density: C/m? surface charge density: electrons/m?
Three identical metal spheres are mounted on insulating stands. Initially, Sphere A has a net charge of -0.8 nC and Spheres B and C are uncharged. Sphere A is touched to Sphere B and removed. Then Sphere A is touched to Sphere C and removed. How many excess electrons or protons are left on Sphere A?
Consider three identical neutral conducting Point Charge. cubes X, Y, and Z connected as shown below. A point charge -2Q is placed near cube Z. Cubes X and Y are disconnected from Cube Z while the point charge is still near. Cubes X and Y are then separated after reaching electrostatic equilibrium. What is the final charge of each cube? -2Q X Y A. X : +Q Y : +Q Z:-2Q В. Х: -Q Y :-Q Z : +2Q С. Х: -2Q Y : 0 Z : +2Q D. X : +2Q Y :0 Z :-2Q