$=\frac{\text{v}\text{e}\text{c}(F{)}^{\text{'}}}{q}$

The figure shows the electric field lines due to two charges. Which of the following statements is NOT correct?

a$)$ The electric field strength is strongest in regions where field lines are closer to one another.

b$)$ The charges have the same magnitude. $-4$ m

c$)$ The charges have the same signs.

d$)$ There is a single point in the space between the two charges where the net electric field strength is zero.

$(9)$ The two charges must be negative.