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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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Figure 24-68 shows a hemisphere with a charge of distributed uniformly through its volume. The hemisphere lies on an xy plane the way half a grapefruit might lie face down on a kitchen table. Point P is located on the plane, along a radial line from the hemisphere鈥檚 center of curvature, at radial distance .What is the electric potential at point P due to the hemisphere?
Figure 24-47 shows a thin plastic rod of length L = 13.5cmand uniform charge 43.6 fC. (a) In terms of distance d, find an expression for the electric potential at point P1. (b) Next, substitute variable xfor dand find an expression for the magnitude of the component Exof the electric field at. (c) What is the direction of Exrelative to the positive direction of the xaxis? (d) What is the value of Exat P1 for x = d = 6.20cm? (e) From the symmetry in Fig. 24-47, determine Eyat P1.
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.
Question: The electric potential at points in an x-yplane is given by. In unit-vector notation, what is the electric field at the point (role="math" localid="1662092062999" )?
A particle of chargeis released from rest at the pointon an x-axis. The particle begins to move due to the presence of a charge Qthat remains fixed at the origin. What is the kinetic energy of the particle at the instant it has moved 40 cmif (a)and (b)?
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