two point charge q1=5.0x10^-6c and q2=-3.0x10^-6c are located on the x-axis at x
ID: 1425363 • Letter: T
Question
two point charge q1=5.0x10^-6c and q2=-3.0x10^-6c are located on the x-axis at x1=-0.3m and x2=0.2m, respectively. Find the electric potential at a point p on the y-axis where y=0.4m,and the potential energy of a test charge of q=1.8x10^-12c at the point p. two point charge q1=5.0x10^-6c and q2=-3.0x10^-6c are located on the x-axis at x1=-0.3m and x2=0.2m, respectively. Find the electric potential at a point p on the y-axis where y=0.4m,and the potential energy of a test charge of q=1.8x10^-12c at the point p. two point charge q1=5.0x10^-6c and q2=-3.0x10^-6c are located on the x-axis at x1=-0.3m and x2=0.2m, respectively. Find the electric potential at a point p on the y-axis where y=0.4m,and the potential energy of a test charge of q=1.8x10^-12c at the point p.Explanation / Answer
POtential due to a point charge = kq1/d1
V = [ kq1/r1 ] + [kq2/r2]
V = [9 x 10^9 x 5 x 10^-6 / sqrt(0.3^2 + 0.4^2) ] + [ 9 x 10^9 x -3x 10^-6 / sqrt(0.4^2 + 0.2^2) ]
= 29626.16 volt
PE =q V = 1.8 x 10^-12 x 29626.16 = 5.33 x 10^-8 J
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