Electric Potential, Electric Potential,Equipotential Serface

1#

97.16: How much work is required to move - 24 l x 2x+4go2tr(bivsrd k;i(r(μC of charge 4.0 m parallel to a uniform+(irl vr txobs i42xr((kg2d; 6.0 N/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 energyo.cm1c uc2w/b of two like charges

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 would be requie5.xpof6:t7 s ivmq: 7x6zob vred to move a 4 coulomb charge 6 meters parallel to a 24 N/Cx xo. :6i zvf 57p7smvb:qo6te 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 23u1g2 hve6qd uz -brbin the picture. At what labeled location is the magnitude of the eleh12 6 -bzg3qv eudbru2ctric 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 Vmbr53.pw v kp,, and 40.0 V. The total work done in movinrm .,kvp 3wb5pg a point charge of + 3.00 μC from position 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 are f44lkt mdcfm -6ixed in space is nec4-64 fmcl kdtmessarily 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 particles with charg e-y/mkjak 9u(esQ, 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 moveda 6;w/(7uwozofpx 9dgcj*y5 i in a straight line to the right from position x = −4.0 m to position x = 9of;ou zy(x g dwi*5/6jcpa7w−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 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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