Six negative point charges and two positive point charges are arranged in a circle as shown in the figure. The charges magnitude. The magnitude of the electric potential generated by each charge is 120 V at the origin. What is the net electric potential generated by all the charges at the origin O? -Q Fig. A Answer: Net potential Volts

An electric dipole consists of two charges of equal magnitude and opposite sign separated by a distance 2a as shown in the figure below. The dipole is along the x axis and is centered at the origin. The electric potential at point R on the positive x axis is given by the following equation: 2kega VR = K₂ Z = K₂ VR = lim When x is much greater than a, the following approximation can be used: 2k ga 2kega x2-a² (x >> a) +² R + x>>a V = (a) Use the information above to find the electric potential created by the dipole described above at the point (3a, 0). (Use any variable or symbol stated above along with the following as necessary: K₂.) (b) By what percentage does your answer differ from the result of the approximate expression that is valid when x is much greater than a. %

Consider the figure shown below. Q1=1.5×10−9 C and Q2=−8.4×10−9 C. Charges Q1, Q2, and point '3' are all located at integer coordinates that you can read off of the graph. Assume the electric potential at infinity is zero. a) Calculate the electric potential at the location marked '3'.

I Review A 13.0 nC charge is at x = Ocm and a -1.4 nC charge is at = 3.0 cm Part A At what point or points on the a-axis is the electric potential zero? Express your answer in centimeters. If there is more than one answer, give each answer separated by a comma. Vα ΑΣφ ? x0 = cm Submit Request Answer

Two point charges, +4.70 µC and -7.10 µC, are separated by 1.90 m. What is the electric potential midway between them? Number i Units

In the figure below, there are four points marked along a line connecting a positive and negative charge. The magnitude of charge for the positive charge (+q) is smaller than the magnitude of charge for the negative charge (-Q). A ·*· -Q B -X- Which of the 4 marked positions could have a net electric field equal to zero? Which of the 4 marked positions could have a net electric potential equal to zero? --- с -X. +q D

Two point charges Q1 +4.20 nC and Q₂ = -1.30 nC are separated by 55.0 cm. (a) What is the electric potential at a point midway between the charges? V = (b) What is the potential energy of the pair of charges? J What is the significance of the algebraic sign of your answer? O Positive work must be done to separate the charges. O Negative work must be done to separate the charges.

Only Part C