Genesis gets accepted to a Dental School in Idaho and when she arrives, she cannot find good signal. To fix this problem,Genesis orders a 2m long antenna on Amazon, and attaches it to her phone.If the antenna carries a 900 mC chorge, what will be the force (mognitude and direction) on a 5 MC that is 30 cm (0.3)aNay from its center ? You have to derive the equation for the Electric field.
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