Acharge of 80 nc is uniformly distributed along the x axis from x=0 to x=2 m .determine the magnitude of electric field at a point on the x axis with x=8 m.
a)30 n/c
b)15
c)48
d)90

The magnitude of the electric field at a point on the x axis with x = 8.0 m is 15 N/C. The correct answer between all the choices given is the second choice or letter B. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

b) 15 N/c

Explanation:

Electric field, dE= Kdq/r^2  

From the question we know that 80nC charge is uniformly distributed from 0 to 2m on the x-axis

Therefore, the charge per unit length, dq = 80nC/2m=40nC/m

The magnitude of electric field at point 8m on the x-axis is given by the integral value of electric field with boundary limit of 0 to 2

 please check the attachment for further explanation

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