Two identical point charges are fixed on a straight line apart
PHYSICS · Single correct · AP · Physics 2: Algebra-based · Electric Force Field and Potential · Electric Force Field and Potential
Problem
Two identical point charges +10μC are fixed on a straight line 40cm apart. A third charge q is to be placed exactly midway between them so that all three charges remain in electrostatic equilibrium (net force on each charge is zero). Which one of the following correctly gives the value of q?
(a) +2.5μC
(b) −10μC
(c) −2.5μC
(d) −5.0μC