Biology Forums - Study Force

A charge of 40 pC is distributed on an isolated spherical conductor that has a 4.0-cm radius. Point A is 1.0 cm from the center of the conductor and point B is 5.0 cm from the center of the conductor. Determine the electric potential difference VA  VB.
 a. +1.8 V
  b. +29 V
  c. +27 V
  d. +7.2 V
  e. +9.0 V

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[Ques. 2] A nonconducting sphere of radius 10 cm is charged uniformly with a density of 100 nC/m3 . What is the magnitude of the potential difference between the center and a point 4.0 cm away?
 a. 12 V
  b. 6.8 V
  c. 3.0 V
  d. 4.7 V
  e. 2.2 V

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[Ques. 3] Charge of uniform density 90 nC/m3 is distributed throughout the inside of a long nonconducting cylindrical rod (radius = 2.0 cm). Determine the magnitude of the potential difference of point A (2.0 cm from the axis of the rod) and point B (4.0 cm from the axis).
 a. 1.9 V
  b. 1.4 V
  c. 2.2 V
  d. 2.8 V
  e. 4.0 V

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[Ques. 4] Charge of uniform density 50 nC/m3 is distributed throughout the inside of a long nonconducting cylindrical rod (radius = 5.0 cm). Determine the magnitude of the potential difference of point A (2.0 cm from the axis of the rod) and point B (4.0 cm from the axis).
 a. 2.7 V
  b. 2.0 V
  c. 2.4 V
  d. 1.7 V
  e. 3.4 V

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[Ques. 5] A solid conducting sphere (radius = 5.0 cm) has a charge of 0.25 nC distributed uniformly on its surface. If point A is located at the center of the sphere and point B is 15 cm from the center, what is the magnitude of the electric potential difference between these two points?
 a. 23 V
  b. 30 V
  c. 15 V
  d. 45 V
  e. 60 V

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[Ques. 6] Two large parallel conducting plates are 8.0 cm apart and carry equal but opposite charges on their facing surfaces. The magnitude of the surface charge density on either of the facing surfaces is 2.0 nC/m2 . Determine the magnitude of the electric potential difference between the plates.
 a. 36 V
  b. 27 V
  c. 18 V
  d. 45 V
  e. 16 V

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[Ques. 7] A rod (length = 2.0 m) is uniformly charged and has a total charge of 5.0 nC. What is the electric potential (relative to zero at infinity) at a point which lies along the axis of the rod and is 3.0 m from the center of the rod?
 a. 22 V
  b. 19 V
  c. 16 V
  d. 25 V
  e. 12 V

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[Ques. 8] A nonuniform linear charge distribution given by (x) = bx, where b is a constant, is distributed along the x axis from x = 0 to x = +L. If b = 40 nC/m2 and L = 0.20 m, what is the electric potential (relative to a potential of zero at infinity) at the point y = 2L on the y axis?
 a. 19 V
  b. 17 V
  c. 21 V
  d. 23 V
  e. 14 V

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[Ques. 9] A linear charge of nonuniform density  = bx, where b = 2.1 nC/m2, is distributed along the x axis from x = 2.0 m to x = 3.0 m. Determine the electric potential (relative to zero at infinity) of the point y = 4.0 m on the y axis.
 a. 36 V
  b. 95 V
  c. 10 V
  d. 17 V
  e. 15 V

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[Ques. 10] Charge of uniform density 12 nC/m is distributed along the x axis from x = 2.0 m to x = 5.0 m. What is the electric potential (relative to zero at infinity) at the origin (x = 0)?
 a. 91 V
  b. 99 V
  c. 82 V
  d. 74 V
  e. 140 V

1)  a

2)  c

3)  b

4)  d

5)  b

6)  c

7)  c

8)  b

9)  c

10)  b

Dude, you're awesome. I wish I had you as my teacher!