Positive charge +Q is distributed uniformly along the +x-axis from x=0 to x=a. Negative charge -Q is distributed uniformly along the -x-axis from x=0 to x=-a.(adsbygoogle = window.adsbygoogle || []).push({});

a). A positive point charge q lies on the positive y-axis, a distance y from the origin. Find the force (magnitude and direction) that the positive and negative charge distributions together exert on q. Show that this force is proportional to y^-3 for y>>a.

b). Suppose instead that the positive point charge q lies on the positive x-axis, a distance x>a from the origin. Find the force (magnitude and direction) that the charge distribution exerts on q. Show that this force is proportional to x^-3 for x>>a.

my problem is that should i use integral to work out it?

is the the force from +Q and -Q act on q change with the distance between them?

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# Homework Help: Electric charge and electric field

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