Point charges q and Q are positioned as shown. If q = +2.0 nC, Q = ?2.0 nC, a = 3.0 m, and b = 4.0 m, what is the electric potential difference, VA?VB?
A. 8.4 V
B. 6.0 V
C. 7.2 V
D. 4.8 V
E. 0 V
Answer: D
You might also like to view...
What is in the box shown below? 
A. Positive charge B. Negative charge C. Zero charge D. One cannot determine the charge’s sign from this diagram.
An ideal solenoid of radius a has n turns per unit length and current I. The magnetic flux ?B through any circular area of radius a inside the solenoid, centered on and perpendicular to the solenoid axis, is
A.
.B.
.C.
D.
E.
Why do we believe a black hole lies toward Sagittarius?
What will be an ideal response?
Three resistors connected in series each carry currents labeled I1, I2 and I3 . Which of the following expresses the value of the total current IT in the system made up of the three resistors in series?
a. IT = I1 + I2 + I3 b. IT = (1/I1 + 1/I2 + 1/I3) c. IT = I1 = I2 = I3 d. IT = (1/I1 + 1/I2 + 1/I3)?1