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## Homework Statement

A charge Q is uniformly distributed along the x axis from x = a to x = b. If Q = 45 nC,

a = –3.0 m, and b = 2.0 m, what is the electric potential (relative to zero at infinity) at the point, x = 8.0 m, on the x axis?

a . 71 V

b. 60 V

c. 49 V <-- correct answer

d. 82 V

e. 150 V

## Homework Equations

lambda = q/x

electric potential = kq/ r

## The Attempt at a Solution

lambda = (45 x 10^=9)/5 = 9 x 10^-9

integrate(kdq/6+x) from -3 to 2

dq = lambda * dx

k*lamda*integral (1/6+x) from -3 to 2 <-- not correct [/B]