The drawing shows a positive point charge +91, a second point charge 92 that may be positive or negative, and a spot lab

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The Drawing Shows A Positive Point Charge 91 A Second Point Charge 92 That May Be Positive Or Negative And A Spot Lab 1 (65 KiB) Viewed 42 times

The drawing shows a positive point charge +91, a second point charge 92 that may be positive or negative, and a spot labeled P, all on the same straight line. The distance d between the two charges is the same as the distance between 91 and the spot P. With 92 present, the magnitude of the net electric field at P is twice what it is when 91 is present alone. Given that qı = +0.60 uc, determine the magnitude 1921 when 92 is (a) positive 1921 = and (b) negative. 1921 = 42 +41