(a) What is the magnitude of the net electric field where the man is standing? N
ID: 1375797 • Letter: #
Question
(a) What is the magnitude of the net electric field where the man is standing?
N/C
(b) What is the direction of the net electric field where the man is standing? (Assume the +x-axis is to the right.)
? counterclockwise from the +x-axis
Explanation / Answer
1) the negative charges and positive charges are equal then q=ne
q=104*4*1.6*10^-19C
=665*10^-19 C
The electric field of the man standing is
E=(1/4*pi*epsilon not)(q1*q2/r^2)(sin(theta) in direction of x axis
But the vertical component can be canceled
changing the expression
E=(1/4*pi*epsilon not)(q*d/((z^2+(0.25)^2)^(3/2))
then substitute the values in above expression,
=(1/4*3.14*8.85*10^-12)((665*10^-19)^2*(0.5))/((0.25)^2+(2)^2)^(3/2))
=352.39*10-13N/C
2) The net electric field acting on the direction of z axis.
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