you find a point in space where you measure the eletric potential to be equal to 0. the elctric field at that point must be: positive, negative, uniform or impossible to determin
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you find a point in space where you measure the eletric potential to be equal to 0. the elctric field at that point must be:
positive, negative, uniform or impossible to determin
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- A particle with charge 8.75 x 10-13 C moves a distance d = 0.30 m in a straight line between points a and b. The electric field is uniform along this line, with magnitude E = 1.5 x 107 V/m = 1.5 x 107 N/C in the direction from a to b. Determine: a) force on the particle; b) work done on it by the field; c) potential difference Va - Vb.In Figure (a), a particle of charge +e is initially at coordinate z = 20 nm on the dipole axis through an electric dipole, on the positive side of the dipole. (The origin of z is at the dipole center.) The particle is then moved along a circular path around the dipole center until it is at coordinate z = -20 nm. Figure (b) gives the work Wa done by the force moving the particle versus the angle θ that locates the particle. The scale of the vertical axis is set by Was = 4.0 × 10-30 J. What is the magnitude of the dipole moment? The answer was not 1.112*10^-36.Figure 24-19 shows three charged particles held in fixed positions by forces that are not shown. What is the electric potential energy U of this system of charges? Assume that d = 12 cm and that 91 = +q, q2 = -4q, and q3 = +2q, in which q = 150 nC. Energy is associated with each pair of particles. p- Figure 24-19 Three charges are fixed at the vertices of an equilateral triangle. What is the electric potential energy of the system?
- Based on the given equipotential lines, what is the direction of the electric field at point 2? 1 cm 1 cm OV 50 V 100 V 1 1 T 1 1 1 1 1 4 1 1 1 1 T 1 I 1 T 1 OV 1 T W 1 1 50 V 100 V h g f a b d C1) A parallel-plate capacitor (of length l and width w) has a dielectric that can slide along its length as shown in the figure below. Calculate the force F acting on the dielectric when it is partially inside the capacitor. The stray fields outside the capacitor can be neglected for this problem. V- F €0The potential energies associated with four orientations of an electric dipole in an electric field are (1) -5U0, (2) -7U0, (3) 3U0, and (4) 5U0, where U0 is positive. Rank the orientations according to (a) the angle between the electric dipole moment and the electric field and (b) the magnitude of the torque on the electric dipole, greatest first.
- EP-2 Equipotential lines for part of a charge distribution are shown to the right. The grid on which the lines are shown measures 1cm by 1cm. 1cm 1cm a) Circle the region on the grid where the electric field strength is greatest and calculate the strength of the field in this region. 2V \4V 6V 8V 10V b) Circle the region on the grid where the electric field strength is least and calculate the strength of the field in this region. c) Sketch 8 electric field lines starting at the center of the 2V circle. Be sure to put an arrowhead on each line. What is the sign of the charge at the center of the 2V circle?A spherical capacitor consists of two concentric spherical conducting thin shells. The inner shell has radius 10.0 cm and carries negative free charge −10.0 nC. The outer shell has radius 20.0 cm and carries positive free charge +10.0 nC. The space between the shells is filled with a dielectric material of dielectric constant K = 3.00. Find the electric field energy density at a point 15.0 cm from the center of the shells. A. B. C. D. E. 70.7 µJ/m³ 212 µJ/m³ 2.62 µJ/m³ 7.85 µJ/m³ 23.6 µJ/m³ 3In the figure below, determine the point (other than infinity) at which the electric field is zero. (Let q, = -1.65 µC and q2 = 6.90 µc.) -1.00 m-
- Two parallel plates of area 100 cm2 are given charges ofequal magnitudes 8.9 * 10-7 C but opposite signs. The electricfield within the dielectric material filling the space between theplates is 1.4 *10^6 V/m. (a) Calculate the dielectric constant of the material. (b) Determine the magnitude of the charge induced oneach dielectric surface.57. A spherical capacitor is formed from two concentric spherical conducting shells separated by vacuum. The inner sphere has a radius of ra = 12.0 cm , and the outer sphere has a radius of rb = 15.1 cm . A potential difference of 120 V is applied to the capacitor. What is the capacitance of the capacitor? What is the magnitude E1 of the electric field E at radius r= 12.8 cm , just outside the inner sphere? What is the magnitude of E at r= 14.7 cm , just inside the outer sphere?15V IDV In the attached pic, equipotential lines with their electric potential values are given 1. Draw the electric field vector at each of the points A, B & C 2. Calculate the change in Electrical Potential Energy when a proton (with positive charge +e) moved from