1. What is a correct expression for the potential energy of the charge configuration illustrated below? Assume the sphere (of radius R) is uniformly charged. a2 kQq kQq, kq,92 А. R+a R+b kQq, kq,q2 kQq B. (R+a) " (R+b)? kQq, kq,q2 kQq С. a b kQq , kQq, kq,q, D. kQq, kQq, Е. b2

Find the charge on capacitor, C2 , in the diagram below if Vab=24.0 volts, C1=6.00uF, C2=3.00uF, and C3=10.0uF. a. 12 µC b. 24 µC c. 36 µC d. 48 µC e. 60 µC

3 A 0.500 cm diameter plastic sphere, used in a static electricity demonstration, has a uniformly distributed 39.0 pC charge on its surface. What is the potential near its surface?   This is not and will not be graded

Consider an infinite line charge with a linear charge density A. The potential difference Vab where points a and b are ra and r, distances away from the line charge respectively, is given by A. Vab 27co (1-). Ta 1 B. Vab = 2TEo ro Ta C. Vab = Ta D. Vab = In E. Vab = ra In

Part G Calculate the charge on capacitor C4. Express your answer in coulombs. ΑΣΦ ? Q4 = C %D

Q1

5. A small sphere with mass 1.50 g hangs by a thread between two parallel vertical plates that are 5.00 cm apart. The sphere carries charge q-8.90x10-6 C. The plates are insulating, and left and right have uniform surface charge densities to and -o, respectively. The space between the plates is filled with air. Find the value of o and the magnitude of the potential difference AV which lead the thread to assume an angle of 30.0° with respect to the vertical.

Select the correct expression for the work required to bring the charge q from infinity to a given point in an external potential V. Select one: = qV ? b. W = q²V a. W = O c. W = qV

1. A negative test charge -do is located relative to positive charges 91 and q2 as shown in figure. Find the electrostatic potential energy of go. H (+ -90 91 + 92