Electric Potential, Electric Potential,Equipotential Serface - 无忧得胜-网上国际课程 (5edu.win)

1#

97.16: How much work is required to move - 24 μC of charge 4.0 m e9m,cq zm.8g) vnx :sb6ol3ivparallel to a uniform 6.0 N8o evcgnbm6i l.qm9zv ):x,s3/C electric field?

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

04.05: The potential energy of two like chargev 5j/4rh-ka svqow/f7 5kjc1b s

A. decreases as the charges are separated.

B. depends on the sign of the charge.

C. is proportional to the square of the relative speed.

D. is inversely proportional to the square of the separation.

E. is repulsive.

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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

00.06: How much work wocf(m b8d;rh, quld be required to move a 4 coulomb charge 6 meters parallelb,c (fd8rhm;q to a 24 N/C electric field?

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

04.37: A series of equipotential lines are shown in the picture. At what lj bk-os3sp 1:rg r5.rnyx-ba5abeled locpb. ga y1o-nbr:k35j -r5r sxsation is the magnitude of the electric field the greatest?

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5#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

95.25 In the figure to the right, equipotential lines are drawn at 0, 20.0 V:zasye3+ q:nnbruxlx- a3.o fi cgqb5r0.48w, and 40.0 V. The total work done in moving a point charge of + 3.00 μC from posy a:-bz b3g+.rwlncuqe s r40ioafxn: qx.53 8ition α to position β is:

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6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

07.28: Which statement about a system of point charges that ar9lx0nrjaf /y3my (5 g(ngnuo/ e fixed in space is necessao uy9n3 gl/0r anfj (/5gn(xmyrily true?

A. If the potential energy of the system is negative, net positive work by an external agent is required to take the charges in the system back to infinity.

B. If the potential energy of the system is positive, net positive work is required to bring any new charge not part of the system in from infinity to its final resting location.

C. If the potential energy of the system is zero, no negative charges are in the configuration.

D. If the potential energy of the system is negative, net positive work by an external agent was required to assemble the system of charges.

E. If the potential energy of the system is zero, then there is no electric force anywhere in space on any other charged particle not part of the system.

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7#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

12.31: Three particlet7v eqf0qz 0c(s with chargesQ, Q and $Q_2$ are initially at rest very (infinitely) far apart from one another. The particles are moved to the locations shown in the figure where they are fixed in place. The particles on the left and right have charge Q and are separated by a distance R. The particle with charge $Q_2$ is located at the midpoint directly between the other charged particles. The total work required to configure this three-particle arrangement is 0. Ignore any self-energies for the particles. What is the value of the charge $Q_2$ ?

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8#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

10.37: A positively charged particle is moved in a straight line to the rit r ged kn6gdplc0i4sw)r87,-ght from position x = −4.0 m to position x = −2.0 m by an external agent. The electric potential at these positions in space are V(x = −4m) = −4.0 Volts and V(x = −2m) = −2.0 Volts. Which statement is true about the work done by the external agent moving the charge between these positions and the electric field component parallel to the direction rn8g,lwst7gr4i dcp ed0k- )6 of motion that the moving charged particle experiences? Assume the particle is moved at constant speed.

A. The external agent does no work since the speed was constant.

B. The external agent does negative work and the electric field is directed to the right.

C. The external agent does positive work and the electric field is directed to the right.

D. The external agent does negative work and the electric field is directed to the left.

E. The external agent does positive work and the electric field is directed to the left.

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