Two infinite parallel surfaces carry uniform charge densities of 0.20 nC/m2 and ?0.60 nC/m2 . What is the magnitude of the electric field at a point between the two surfaces?
a. 34 N/C
b. 23 N/C
c. 45 N/C
d. 17 N/C
e. 90 N/C
c
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