Electric Potential, Electric Potential,Equipotential Serface

1#

97.16: How much work is required to move - 24 μC of charge 4.0 m parallejf orcr15i2/zl to a uniform 6.0 N/C electric 2/ or zr5i1cjffield?

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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 lik 2mwot1awih :5e 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 required to move a8d ,7-d u 53*k:rvdxgqoocgpo 4 coulomb charge 6 meters paralleg57o* prdx-o 8,q ukd ov3:dcgl 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 labelexje +e3-vat /: hxjq+id location is the3ai+ exhe- /j+xqvjt : 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. ;xhfc7xdvj6*no y ;(q0k0itmlon-3w0 V, and 40.0 V. The total work done in moving a point charge of + 3.00 μC from position α to posn *viotm3 w-0jo7d( ;hcqy6n 0lxxk;fition 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 fixed in space ibozm8 l,m5h4k s necessarily truo b,h4ml z85mke?

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 chargesQ,i5(* ciuo e2n-vp.l uk0a4ofg 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 move8qna zm0*wz a gyszt m)pl5x8lb a662.d in a straight line to the right 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 trum0g*5l82swnb t6al.)a p mzxyq86zzae 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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