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PeachBanana
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Homework Statement
7) A uniform electric field of magnitude of E=5.5 ×10^3 N/C points in the positive x axis
direction. The electric potential at the origin (x,y)=(0,0) of the xy-coordinate system is 0V. Find the electric potential at the point (x,y)=(10.0 cm, 10.0 cm).
A) -777.8 V
B) 777.8 V
C) 550 V
D) -550 V
E) 1100 V
Homework Equations
E = kq/r^2
V = kq/r
The Attempt at a Solution
I thought I would have to find the charge (even though it does not mention any point charges) at (10,10).
5.5*10^3 N/C = (8.99*10^9 Nm^2/C^2)(q1)
---------------------------
(0.10)^2
q1 = 6.1179*10^-9 C
Then I thought "Oh...well I'm assuming this is the charge at (10,10)."
V = (8.99*10^9 Nm^2/C^2)(6.1179*10^-9C) / (200^.5) = 3.813 V