Assignment Previewer
1 of 5
http://www.webassign.net/v4cgi/assignments/preview.tpl?aid=2782518&deployment=4631744...
HW05-Electric Potential (2782518)
Due:
Fri Oct 5 2012 01:00 PM EDT
Question
1.
1
2
3
4
5
6
7
8
9 10
Question Details
SerPSE8 25.P.001.MI. [1428906]
-
(a) Calculate the speed of a proton that is accelerated from rest through an electric potential difference of 142 V.
1.65e+05 m/s
(b) Calculate the speed of an electron that is accelerated through the same potential difference.
7.06e+06 m/s
2.
Question Details
SerPSE8 25.P.003.WI. [1428894]
A uniform electric field of magnitude 260 V/m is directed in the negative y direction as shown in the figure below. The coordinates of point
-0.850) m, and those of point
-
are (-0.400,
are (0.800, 0.800) m. Calculate the electric potential difference VB − VA using the dashed-line path.
429 V
3.
Question Details
An electron moving parallel to the x axis has an initial speed of 3.18
SerPSE8 25.P.005.MI. [1428910]
106 m/s at the origin. Its speed is reduced to 1.56
-
105 m/s at the point x = 2.00 cm.
(a) Calculate the electric potential difference between the origin and that point.
9/4/2012 4:02 PM
Assignment Previewer
2 of 5
http://www.webassign.net/v4cgi/assignments/preview.tpl?aid=2782518&deployment=4631744...
-28.7 Volts
(b) Which point is at the higher potential?
the origin
the point x = 2.00 cm
both have the same potential
4.
Question Details
SerPSE8 25.P.015.WI. [1428903]
Given two particles with Q = 4.40-µC charges as shown in the figure below and a particle with charge q = 1.33
reference level of potential V = 0 at r =
10
-18
-
C at the origin. (Note: Assume a
.)
(a) What is the net force exerted by the two 4.40-µC charges on the test charge q?
0 N
(b) What is the electric field at the origin due to the two 4.40-µC particles?
0 N/C
(c) What is the electrical potential at the origin due to the two 4.40-µC particles?
98.9 kV
5.
Question Details
SerPSE8 25.P.016. [1385785]
-
The two charges in the figure below are separated by a distance d = 4.50 cm, and Q = +2.60 nC.
9/4/2012 4:02 PM
Assignment Previewer
3 of 5
http://www.webassign.net/v4cgi/assignments/preview.tpl?aid=2782518&deployment=4631744...
(a) Find the electric potential at A.
1.25 kV
(b) Find the electric potential at B.
1.41 kV
(c) Find the electric potential difference between B and A.
152 V
6.
Question Details
SerPSE8 25.P.019. [1358418]
-
A charge +q is at the origin. A charge -2q is at x = 5.00 m on the +x axis.
(a) For what finite value of x is the electric field zero?
-12.1 m
(b) For what finite values of x is the electric potential zero? (Note: Assume a reference level of potential V = 0 at r =
.)
Smallest value of x:
-5 m
Largest value of x:
1.67 m
7.
Question Details
SerPSE8 25.P.033.WI. [2021785]
-
The potential in a region between x = 0 and x = 6.00 m is V = a + bx, where a = 16.4 V and b = -7.90 V/m.
9/4/2012 4:02 PM
Assignment Previewer
4 of 5
http://www.webassign.net/v4cgi/assignments/preview.tpl?aid=2782518&deployment=4631744...
(a) Determine the potential at x = 0.
16.4 V
Determine the potential at x = 3.00 m.
-7.3 V
Determine the potential at x = 6.00 m.
-31 V
(b) Determine the magnitude and direction of the electric field at x = 0.
magnitude
direction
7.9 V/m
+x
Determine the magnitude and direction of the electric field at x = 3.00 m.
magnitude
direction
7.9 V/m
+x
Determine the magnitude and direction of the electric field at x = 6.00 m.
magnitude
direction
8.
7.9 V/m
+x
Question Details
SerPSE8 25.P.040.WI. [1428893]
-
A uniformly charged insulating rod of length 12.0 cm is bent into the shape of a semicircle as shown in the figure below. The rod has a total charge of -7.00 µC.
Find the electric potential at O, the center of the semicircle.
-1.65 MV
9/4/2012 4:02 PM
Assignment Previewer
5 of 5
9.
http://www.webassign.net/v4cgi/assignments/preview.tpl?aid=2782518&deployment=4631744...
Question Details
SerPSE8 25.P.045. [1358615]
-
How many electrons should be removed from an initially uncharged spherical conductor of radius 0.100 m to produce a potential of 6.00 kV at the surface?
4.17e+11 electrons
10.
Question Details
SerPSE8 25.P.055. [1403738]
-
The electric potential immediately outside a charged conducting sphere is 190 V, and 10.0 cm farther from the center of the sphere the potential is 140 V.
(a) Determine the radius of the sphere.
28 cm
(b) Determine the charge on the sphere.
5.92 nC
The electric potential immediately outside another charged conducting sphere is 210 V, and 10.0 cm farther from the center the magnitude of the electric field
is 360 V/m.
(c) Determine all possible values for the radius of the sphere. (Enter your answers from smallest to largest. If only one value exists, enter "NONE" in
the second answer blank.)
r1 =
2.82 cm
r2 =
35.5 cm
(d) Determine the charge on the sphere for each value of r. (If only one value exists, enter "NONE" in the second answer blank.)
q1 =
0.658 nC
q2 =
8.3 nC
Assignment Details
9/4/2012 4:02 PM