Question: Three fixed point source charges (QA = +Q and QB = Qc = -2) form an isosceles triangle, as shown. A point test charge

Three fixed point source charges (QA = +Q and QB = Qc = -2) form an isosceles triangle, as shown. A point test charge (not shown) can be moved around the plane containing the three sources. Show approximately, with a brief explanation, all the points where the test will experience a zero net electric force from the sources if the test charge is (i) positive, (ii) negative. Q B QA

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