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Chapter 24: Q50P (page 713)
Question: In Fig. 24-54, how much work must we do to bring a particle, of chargeand initially at rest, along the dashed line from infinity to the indicated point near two fixed particles of charges? Distance,
Answer:
The work that must be done to bring the particle is 0J.
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Question: A plastic disk of radius R = 64.0 cmis charged on one side with a uniform surface charge density, and then three quadrants of the disk are removed. The remaining quadrant is shown in Fig. 24-50.With V =0at infinity, what is the potential due to the remaining quadrant at point P, which is on the central axis of the original disk at distance D = 25.9 cmfrom the original center?
In Fig. 24-31a, what is the potential at point P due to charge Q at distance R from P? Set at infinity. (b) In Fig. 24-31b, the same charge has been spread uniformly over a circular arc of radius R and central angle 40. What is the potential at point P, the center of curvature of the arc? (c) In Fig. 24-31c, the same charge Q has been spread uniformly over a circle of radius R . What is the potential at point P , the center of the circle? (d) Rank the three situations according to the magnitude of the electric field that is set up at P, greatest first.
A Gaussian sphere of radius is centered on a ball that has a radius ofrole="math" localid="1662731665361" and a uniform charge distribution. The total (net) electric flux through the surface of the Gaussian sphere is . What is the electric potential from the center of the ball?
Figure 24-30 shows a system of three charged particles. If you move the particle of chargefrom point Ato point D, are the following quantities positive, negative, or zero: (a) the change in the electric potential energy of the three particle system, (b) the work done by the net electric force on the particle you moved (that is, the net force due to the other two particles), and (c) the work done by your force? (d) What are the answers to (a) through (c) if, instead, the particle is moved from Bto C?
Identical charges are fixed on an xaxis at. A particle of chargeis then released from rest at a point on the positive part of the yaxis. Due to the symmetry of the situation, the particle moves along the yaxis and has kinetic energy 1.2 Jas it passes through the point. (a) What is the kinetic energy of the particle as it passes through the origin? (b) At what negative value of ywill the particle momentarily stop?
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