When an electron moves from A to B along an electric field line in the figure, the electric field does 5.39 x 10-19 J of work on it. What are the electric potential differences (a)VB-VA. (b)VC-VA, and (c)Vc - VB? (a) Number IN (b) Number i (c) Number i Electric field line Units Units Units -Equipotentials
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- Question 19 A set of two parallel plates of area A separated by a very small distance d makes up an ideal parallel-plate capacitor. The capacitor stores energy Uo when the capacitor plates have charges +Q and -Q. How much electrical energy is stored in the capacitor if the distance between the plates is doubled? O Uo/2 O 200 O 400 Uo O U0/4 OA proton moves parallel to an electric field between points A and B. The change in the proton's electric potential energy is EPEB – EPEA. If the proton is removed from point B and replaced with an electron, how does the change in electric potential energy of the electron compare to the change in electric potential energy of the proton as the electron moves from point B to point A?In the figure shown, which of the following gives the correct order of the electric potential, from largest to smallest? A B D 20 O A B. C. D O D, B, C, A O C, A. B, D O D, C. B, A
- Two particles with charges +3e and -7e are initially very far apart (effectively an infinite distance apart). They are then fixed at positions that are 6.47 x 10-10 m apart. What is EPEfinal - EPE initial, which is the change in the electric potential energy? Number i Units6. A negatively charged particle (q = -2.0 C), is observed to move along a virtually flat equipotential surface of V = 100 v. Determine the work done by the electric field when the particle moves 5.0 m along the surface. A. W = 50 J B. W = 20 J C. W = 10 J D. W = 5 J E. W = 0 JWhere is the magnitude of the electric potential greatest? y A +2 R ' B 1 I
- 5) The equipotential surfaces of a system is shown in the figure. What is the direction of the electric field? y (cm) VI V4 2 10 x (cm) 12 6. V= 30.0 V V= 20.0 V V3 10.0 V V= 0.00 V 8, 2. 6, 4,The work done by an electricforce in moving a charge from point A to point B is 2.51x 103 J. The electric potential difference between the two points is VA- VB = 55.9 V. What is the charge? Number Units-10V -5V OV 5V D E В A 11. The diagram above shows equipotential lines produced by a charge distribution. A, B, C, D, and E are points in the plane. An electron begins at point A. The electron is then moved to point E and then from point E to point C. Which of the following correctly describes the work done by the field for each part of the movement? Movement Movement from A to E (A) Negative (B) Zero (C) Zero (D) Negative from E to C Positive Positive Negative Zero
- The figure shows equipotential curves for 30.0 V, 10.0 V, and -10.0 V. A proton follows the path shown in the figure. A B 30.0 V 10.0 V -10.0 V If the proton's speed at point A is 68.0 km/s, what is its speed UB at point B? m/s UR = Question Source: Freedman College Physics 3e | Publisher: Ma MacBook AirIn the figure below, equipotential lines are shown at 1-m intervals. Suppose that V₁ = 7 V₁ V₂ = 14 V, V3 = 21 V, V4 = 28 V, and V5 = 35 V. OV V₁ V₂ A V3 I Submit B V₁ 0 m 1 m 2m 3m 4 m 5 m Submit V₂ 1) What is the electric field at point A? Enter a positive value if the electric field points in the +x direction and a negative value if if the electric field points in the -x direction. (Express your answer to two significant figures.) V/m 2) What is the electric field at point B? Enter a positive value if the electric field points in the +x direction and a negative value if if the electric field points in the -x direction. (Express your answer to two significant figures.) V/mFirst box choices are positve work, negative work, It cannot be determined without knowing the moving path, zero work. the second box is -50, -40, 30, -30, 50 (eV) and the third box pick from I-VI