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March 30, 2015

Homework Help: physics

Posted by alex on Sunday, September 18, 2011 at 8:46pm.

A charge of 8 pC is uniformly distributed throughout the volume between concentric spherical surfaces having radii of 1.7 cm and3.7 cm. What is the magnitude of the electric field 2.6 cm from the center of the surfaces?
Let k_e=8.98755*10^9 N*m^2/C^2

I used the formula
E=k_e(Q/r^2) because the distance is greater than the inner sphere; however, the answer I'm getting 106.362 N/C is supposedly wrong.

Am I using the wrong formula or what?

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