Question

Four equal +6.00-μC point charges are placed at the corners of a square 2.00 m on each side. ( = 1/4π = 8.99 × 109 N · m2/C2)
(a) What is the electric potential (relative to infinity) due to these charges at the center of this square?
It is four times the potential due to a charge at a single corner.

Your equation
1/4¦Ð = 8.99 ¡Á 10^9 N ¡¤ m2/C2
is obviously incorrect.

The distance from the center of the square to a corner is R = 1.414 m

The potential due to a single corner charge is
kQ/R
where Q = 6.00*10^-6 C
k = 8.99 ¡Á 10^9 N¡¤m^2/C^2

153kv
153 kV is the correct answer
You must check if the problem says that charges are equal in magnitude and SIGNS, if all the charges are positive then you have the answer

Related Questions

four particles with charges +5x10^-6C, +3x10^-6, +3x10^-6C, and +5x10^-6C are placed at the corners... four equal point charges are at the corners of a square. where besides infinity and at the center of... four equal-magnitude (4uc)charges are placed at the four corners of a square that is 20cm on each si... Three equal negative point charges are placed at three of the corners of a square of side d. What is...