Note the magnitude of the point charge on which a uniform electric field of 600 n / cell acts with a strength of 0.3 μC.

Initial conditions: E (strength of a uniform electric field) = 600 N / C; F (force acting on the desired charge) = 0.3 μN (0.3 * 10 ^ -6 N).

The value of the considered point charge can be determined by the formula: q = F / E.

Let’s perform the calculation: q = 0.3 * 10 ^ -6 / 600 = 0.0005 * 10 ^ -6 C = 0.5 * 10 ^ -9 C = 0.5 nC.

Answer: The considered point charge is 0.5 nC.