Two point charges, separated by 1.5 cm, have charge values of +2.0 and -4.0 µC, respectively. Suppose we determine that 10 field lines radiate out from the +2.0-µC charge. If so, what might be inferred about the -4.0 $\mu$C charge with respect to field lines?

Question

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The number of field lines is proportional to the magnitude of the charge. If 10 field lines radiate from +2.0 µC, then for -4.0 µC, which is twice the magnitude, 20 field lines should radiate in.

Two Point Charges, Separated by 1 μ\muμ C Charge with Respect to Field Lines? A) 40 Radiate

Two Point Charges, Separated by 1 $\mu$ C Charge with Respect to Field Lines?
A) 40 Radiate