There is a point charge Q1 at x= 0 and a charge Q2 at x=d. What is the relationship between these charges if the resulting electric field is zero at the following points: a) x= d/2 b) x= 2d c) x= -d/2?
Ei=kqiri2,E_i=\frac{kq_i}{r_i^2},Ei=ri2kqi,
a)
q2q1=1,\frac{q_2}{q_1}=1,q1q2=1,
b)
q2q1=−0.25,\frac{q_2}{q_1}=-0.25,q1q2=−0.25,
c)
q2q1=−9.\frac{q_2}{q_1}=-9.q1q2=−9.
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