- #1
aliaze1
- 174
- 1
Homework Statement
What are the strength and direction of the electric field at the position indicated by the dot?
Part A:
Give your answer in terms of the horizontal and vertical components, separated by commas. Take the positive directions to be up and to the right.
Part B:
Specify the strength of the electric field.
Homework Equations
[1/(4πε0)]*(|q|/r2)
The Attempt at a Solution
[1/(4πε0)]=9*109
q1=-5*10-9
q2=10*10-9
q3=10*10-9
r1=0.02m
r2=0.04m
r3=√(0.002)=(0.002)0.5=~0.0447m
E1={[9*109]*[5*10-9]}/(0.02m)2
E2={[9*109]*[10*10-9]}/(0.04m)2
E3={[9*109]*[10*10-9]}/(0.002m)
E1=112500 j
E2=56250 i
E3=45000
E3_i=45000*(0.04/0.0447)=40249 i
E3_j=45000*(0.02/0.0447)=20134 j
Right is positive, therefore:
E2= -56250 i
E3_i= -40249 i
ETotal_i= -56250 + -40249 = -96499 i
ETotal_j= 20134 + 112500 = 133534 j
This is coming out as 'incorrect', and therefore I cannot proceed to part 2
Where am I going wrong?
Thanks!
Last edited: