A particle with charge -40.0 nC is on the x axis at the point with coordinate x = 0. A second panicle, with charge -20.0 nC, is on the x axis at x = 0.500 in. (i) Is the point at a finite distance where the electric field is zero (a) to the left of .v = 0, (b) between x = 0 and x = 0.500 in, or (c) to the right of x m 0.500 in? (ii) Is the electric potential zero at this point? (a) No; it is positive, (b) Yes. (c) No; it is negative. (iii) Is there a point at a finite distance where the electric potential is zero? (a) Yes; it is to the left of x = 0. (b) Yes; it is between x = 0 and x = 0.500 in. (c) Yes; it is to the right of x = 0.500 in. (d) No.
A particle with charge -40.0 nC is on the x axis at the point with coordinate x = 0. A second panicle, with charge -20.0 nC, is on the x axis at x = 0.500 in. (i) Is the point at a finite distance where the electric field is zero (a) to the left of .v = 0, (b) between x = 0 and x = 0.500 in, or (c) to the right of x m 0.500 in? (ii) Is the electric potential zero at this point? (a) No; it is positive, (b) Yes. (c) No; it is negative. (iii) Is there a point at a finite distance where the electric potential is zero? (a) Yes; it is to the left of x = 0. (b) Yes; it is between x = 0 and x = 0.500 in. (c) Yes; it is to the right of x = 0.500 in. (d) No.
Solution Summary: The author explains that the electric field is zero between x=0 and
A particle with charge -40.0 nC is on the x axis at the point with coordinate x = 0. A second panicle, with charge -20.0 nC, is on the x axis at x = 0.500 in. (i) Is the point at a finite distance where the electric field is zero (a) to the left of .v = 0, (b) between x = 0 and x = 0.500 in, or (c) to the right of x m 0.500 in? (ii) Is the electric potential zero at this point? (a) No; it is positive, (b) Yes. (c) No; it is negative. (iii) Is there a point at a finite distance where the electric potential is zero? (a) Yes; it is to the left of x = 0. (b) Yes; it is between x = 0 and x = 0.500 in. (c) Yes; it is to the right of x = 0.500 in. (d) No.
(a) A small Styrofoam bead with a charge of -60.0 nc is at the center of an
insulating plastic spherical shell with an inner radius of 20.0 cm and an
outer radius of 34.0 cm. The plastic material of the spherical shell is
charged, with a uniform volume charge density of -1.50 pC/m³. A proton
moves in a circular orbit just outside the spherical shell. What is the
speed of the proton (in m/s)?
m/s
(b) What If? Suppose the spherical shell carries a positive charge density
instead. What is the maximum value the charge density (in µC/m³) the
spherical shell can have below which a proton can orbit the spherical
shell?
µC/m3
(c)
d) 2R
R.
R.
R.
Two uniform line charges of = 4n C/m each are parallel to the z-axis at (0, 4)m and (0,
-4)m. Magnitude of electric field at points (+4, 0, 0) is
(a) 9 V/m
(b) 18 V/m
C4.5 V/m
(d) 9/2 V/m
A point charge q=+2 nC is at the origin (x = 0), and a
second point charge q2= -5 nC is on the x-axis at x =
0.7 m.
(a) Find the electric field (magnitude and direction) at
x = 1.2 m (point b) on the -axis
Chapter 25 Solutions
Physics for Scientists and Engineers, Technology Update (No access codes included)
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