Problem 2: (8% of Assignment Value)Two charges are placed on thex axis with the positive direction towards the right of the page. As shown in the drawing, charge92 is placed a distanceD (upper case) to the right of charge91. Consider pointP which is located between the two charges and a distanced (lower case) to the right of charge91.Let91=-55мс,92 = +25MC,D=120cm andd=25cm.D.91P92Part (a)If the electric field at point P is expressed as Ĕ = Ex ₁, what is the value of Ex, in newtons per coulomb?Part (b)Suppose a charge 93 = 20.0 μC is placed at point P. If the force on charge q3 is expressed as F = Fx ₁, what is the value of Fx, in newtons?Fx = ||NGD

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Answered: Problem 2: (8% of Assignment Value) Two…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter24: Electric Fields

Section: Chapter Questions

Problem 4PQ

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Suppose Earth and the Moon each carried a net negative charge Q . Approximate both bodies as point masses and point charges. (a) What value of Q is required to balance the gravitational attraction between Earth and the Moon? (b) Does the distance between Earth and the Moon affect your answer? Explain. (c) How many electrons would be needed to produce this charge?
In this exercise, you practice electric field lines. Make sure you represent both the magnitude and direction of the electric field adequately. Note that the number of lines into or out of charges is proportional to the charges. (a) Draw the electric field lines map for two charges +20C and 20C situated 5 cm from each other. (b) Draw the electric field lines map for two charges +20C and +20C situated 5 cm from each other. (c) Draw the electric field lines map for two charges +20C and 30C situated 5 cm from each other.
A long cylinder of copper of radius 3 cm is charged so that it has a uniform charge per unit length on its surface of 3 C/m. (a) Find the electric field inside and outside the cylinder. (b) Draw electric field lines in a plane perpendicular to the rod.
Consider a uranium nucleus to be sphere of radius R=7.41015 m with a charge of 92e distributed uniformly throughout its volume. (a) is the electric force exerted on an electron when it is 3.01015 m from the center of the nucleus? (b) What is the acceleration of the electron at this point?
A thin, square, conducting plate 50.0 cm on a side lies in the xy plane. A total charge of 4.00 108 C is placed on the plate. Find (a) the charge density on each face of the plate, (b) the electric field just above the plate, and (c) the electric field just below the plate. You may assume the charge density is uniform.
Two small, identical metal balls with charges 5.0 C and 15.0 C are held in place 1.0 m apart. In an experiment, they are connected for a short time by a conducting wire. a. What will be the charge on each ball after this experiment? b. By what factor will the magnitude of the electrostatic force on either ball change after this experiment is performed?
Three charged particles lie along a single line. Is it possible for one of the charges at either end to have zero net electrostatic force exerted on it? Explain.
A very long line of charge with a linear charge density, , is parallel to another very long line of charge with a linear charge density, 2. Both lines are parallel to the y-axis, and are the same distance r from the y-axis, where the first wire is to the left of the origin and the second is to the right. Use Gausss law and the principle of superposition to find an expression for the magnitude of the electric field at the origin.
Sketch the electric field lines in the vicinity of two opposite charges, where the negative charge is three times greater in magnitude than the positive. (See Figure 1S.47 for a similar situation).
In which of the following contexts ran Gausss law not be readily applied to find the electric field? (a) near a long, uniformly charged wire (b) above a large, uniformly charged plane (c) inside a uniformly charged ball (d) outside a uniformly charged sphere (e) Gausss law can be readily applied to find the electric field in all these contexts.
Suppose the electric field of Quick Quiz 15.7 is tilted 60 away from the positive z-direction. Calculate the magnitude of the flux through the same area. (a) 0 (b) 10.0 N m2/C (c) 20.0 N m2/C (d) More information is needed
Suppose you place a charge q near a large metal plate. (a) If q is attracted to to the plate, is the plate necessarily charged? (b) If q is repelled by the plate, is the plate necessarily charged?

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