[单选题]
A charge of X and a -)*s+ kp)8wnmdqjh x(0,h rvexr vu)echarge of 20nC are held at a fixed distance.
gzd .)zwy4 ci)w4d+ wm A point where the electric field is zero can only be found in region 1. Which of the following statements is true about the charge on X
A. Positive and bigger than 20nC
B. Positive and smaller than 20nC
C. Negative and bigger than 20nC
D. Negative and smaller than 20nC
