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- 1. Multiple ChoiceA proton is released from rest at the origin in a uniform electric field in the positive x direction with magnitude 850 N/C. What is the change in the electric potential energy of the proton–field system when the proton travels to x = 2.50 m?3.40 × 10-16 J-3.40 × 10-16 J2.50 × 10-16 J4-2.50 × 10-16 J
- 2. Multiple ChoiceAn electron volt isthe force acting on an electron in a field of 1 N/Cthe force required to move an electron 1 meterthe energy gained by an electron in moving through a potential difference of 1 voltthe energy needed to move an electron through 1 meter in any electric field
- 3. Multiple ChoiceA tiny sphere carrying a charge of 6.5 µC sits in an electric field, at a point where the electric potential is 240 V. What is the sphere’s potential energy?2.7 x 10-8 J6.5 x 10-6 J1.6 x 10-3 J240 J
- 4. Multiple Choice
An electron moves from point i to point f, in the direction of a uniform electric field. During this motion:the work done by the field is positive and the potential energy of the electron-field system increasesthe work done by the field is negative and the potential energy of the electron-field system increasesthe work done by the field is positive and the potential energy of the electron-field system decreasesthe work done by the field is negative and the potential energy of the electron-field system decreases - 5. Multiple ChoiceIf 500 J of work are required to carry a 40-C charge from one point to another, the potential difference between these two points is:12.5 V20,000 V0.08 Vdepends on the path
- 6. Multiple ChoiceThe potential difference between two points is 100 V. If a particle with a charge of 2 C is transported from one of these points to the other, the magnitude of the work done is:200 J100 J50 J2 J
- 7. Multiple ChoiceDuring a lightning discharge, 30 C of charge move through a potential difference of 1.0 x 108 V in 2.0 x 10–2 s. The energy released by this lightning bolt is:1.5 ´ 1011 J3.0 ´ 109 J6.0 ´ 107 J3.3 ´ 106 J
- 8. Multiple ChoiceAn electron goes from one equipotential surface to another along one of the four paths shown below. Rank the paths according to the work done by the electric field, from least to greatest.1, 2, 3, 44, 3, 2, 11, then 3, then 4 and 2 tie4 and 2 tie, then 3, then 1
- 9. Multiple ChoiceThe electric field around an isolated electron has a certain strength 1 cm from the electron. The electric field strength 2 cm from the electron ishalf as much.the same.twice as much.one fourth times as much.
- 10. Multiple ChoiceA 2-C charge experiences a force of 40 N when put at a certain location in space. The electric field at that location is .2 N/C.20 N/C30 N/C.40 N/C.
- 11. Multiple ChoiceA 5-C charge is located near a positively charged sphere so that it has 50 J of electric potential energy. Its electric potential is2 V.5 V.10 V.20 V
- 12. Multiple ChoiceIf you use 17 J of work to push a charge into an electric field and then release the charge, as the charge flies past its starting position, its kinetic energy ismore than 17 J.less than 17 J.17 J.
- 13. Multiple ChoiceThe electrical force on a 2-C charge is 20 N. What is the value of the electric field at the location of the charge?2 N/C10 N/C20 N/C40 N/C
- 14. Multiple ChoiceWhat do you call the process of charging a conductor by bringing it near another charged object?inductionpolarizationneutralizationconduction
- 15. Multiple ChoiceWhich of the following labeled points is in the region with the strongest force of electric chargeABCD
- 16. Multiple ChoiceWhat does it mean when the electric field lines are close together?the field is positivethe field is negativeThe field is strongthe field is weak
- 17. Multiple ChoiceThe electric flux Φ through a surfaceis the amount of electric field piercing the surfaceis the electric field multiplied by the area.does not depend on the area involvedis the line integral of the electric field around the edge of the surface
- 18. Multiple ChoiceCharge Q is distributed uniformly throughout a spherical insulating shell. The net electric flux through the inner surface of the shell is:0Q/e02Q/e0Q/4*Pi*e0
- 19. Multiple ChoiceThe area vector for a flat surfaceis parallel to the surface and has a magnitude equal to the length of a side of the surface.is perpendicular to the surface and has a magnitude equal to the length of a side of the surface.is parallel to the surface and has a magnitude equal to the area of the surface.is perpendicular to the surface and has a magnitude equal to the area of the surface.
- 20. Multiple ChoiceWhen a piece of paper is held with one face perpendicular to a uniform electric field the flux through it is 25 N×m2/C. When the paper is turned 25° with respect to the field the flux through it is:0 N×m2/C11 N×m2/C12 N×m2/C23 N×m2/C
- 21. Multiple ChoiceA cylindrical wastepaper basket with a 0.15-m radius opening is in a uniform electric field of 300 N/C, perpendicular to the opening. The total flux through the sides and bottom is:0 N×m2/C4.2 N×m2/C21 N×m2/C280 N×m2/C
- 22. Multiple ChoiceA point particle with charge q is placed inside a cube but not at its center. The electric flux through any one side of the cube:is zerois q/2ε0is q/4ε0is q/6ε0
- 23. Multiple ChoiceThe flux of the electric field (24 N/C)i + (30 N/C)j + (16 N/C)k through a 2.0 m2 portion of the yz plane is:32 N × m2/C34 N × m2/C42 N × m2/C48 N × m2/C
- 24. Multiple ChoiceIn the diagram below, P is a point near a negatively charged sphere. Which direction best represents the direction of the electric field at point P?RightLeftUpDown
- 25. Multiple ChoiceWhich quantity and unit are correctly paired?electric field strength and N/Celectricity and Coulombselectrostatic force and electronselectric field strength and E
- 26. Multiple ChoiceA point charge Q is far from all other charges. At a distance of 2 m from Q, the electric field is 20 N/C. What is the force a charge of 5 Coulombs feels?4 N100 N40 N10 N
- 27. Multiple ChoiceWhich of the following statements is false about electric field lineselectric field lines cannot crosselectric field lines point away from positive chargeelectric field lines are always straight lineselectric field lines show how a proton would move in an electric field
- 28. Multiple ChoiceAt which point is the electric field the strongestABCD
- 29. Multiple ChoiceAt which point is the electric field the weakest?A because it is the furthest awayA because the field lines are further apartC because the field lines are further apartC because it is the furthest away
- 30. Multiple ChoiceConsider the electric field lines shown in the diagram below. From the diagram, it is apparent that object A is ____ and object B is ____.+,++,--,+-,-
- 31. Multiple ChoiceTwo charges separated by a distance of 1 meter exert a 20-N force on each other. If the charges are pulled to a 2 meter separation distance, the force on each charge will be10 N5 N2.5 N40 N
- 32. Multiple ChoiceAn electrostatic force of 2 X 102. newtons is exerted on a charge of 4 coulomb at point P in an electric field. The magnitude of the electric field intensity at P is8 X 102 N/C5 N/C2 X 10-2 N/C50 N/C
- 33. Multiple ChoiceIt is observed that Balloon A is charged negatively. Balloon B exerts a repulsive effect upon balloon A. Would the electric field vector created by balloon B be directed towards B or away from B and why?towards because electric field lines point away from negative chargestowards because electric field lines point away from positive chargesaway because electric field lines point away from negative chargesaway because electric field lines point toward positive charges
- 34. Multiple ChoiceQA and QB are two charges creating an electric field. Based on the electric field lines, we can concludeQA and QB are both positiveQA and QB are both negativeQA is positive and QB is negativeQA is negative and QB is positive
- 35. Multiple ChoiceWhich of the following is a true statement about the electric field between the two plates?The field is attractive between the plates and uniform in strengthThe field is repulsive between the plates and uniform in strengthThe field is attractive between the plates and strongest near the positiveThe field is repulsive between the plates and strongest near the positive
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