Concept explainers
A particle with charge
Is the Work do by the electric field on the particle positive, negative, or zero? Explain using a sketch that shows the electric force on the particle and the displacement of the particle.
Compare the work done by the electric field when the particle travels from point W to point X to that done when the particle travels from point X to point W.
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- (a) Find the electric potential difference Ve required to stop an electron (called a stopping potential) moving with an initial speed of 2.85 107 m/s. (b) Would a proton traveling at the same speed require a greater or lesser magnitude of electric potential difference? Explain. (c) Find a symbolic expression for the ratio of the proton stopping potential and the electron stopping potential. Vp/Ve.arrow_forwardTwo point charges, q1 = 2.0 C and q2 = 2.0 C, are placed on the x axis at x = 1.0 m and x = 1.0 m, respectively (Fig. P26.24). a. What are the electric potentials at the points P (0, 1.0 m) and R (2.0 m, 0)? b. Find the work done in moving a 1.0-C charge from P to R along a straight line joining the two points. c. Is there any path along which the work done in moving the charge from P to R is less than the value from part (b)? Explain.arrow_forwardA uniformly charged ring with total charge q = 3.00 C and radius R = 10.0 cm is placed with its center at the origin and oriented in the xy plane. What is the difference between the electric potential at the origin and the electric potential at the point (0, 0, 30.0 cm)?arrow_forward
- Rank the potential energies of the four systems of particles shown in Figure OQ20.6 from largest to smallest. Include equalities if appropriate. Figure OQ20.6arrow_forwardFigure P26.68 shows three small spheres with identical charges of 3.00 nC placed at the vertices of an equilateral triangle with side d = 2.50 cm. a. Is the electric potential due to the three spheres zero anywhere in the plane that contains the triangle, other than at infinity? b. What is the electric potential at the location of each sphere due to the other two spheres? FIGURE P26.68arrow_forwardFind the electric potential at the origin given the arrangement of charged particles shown in Figure P26.7. FIGURE P26.7 Problems 7 and 28.arrow_forward
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