E = qU => q = E/U
q = 0.5 10^-6 / 250 = 0.5*10^-6 / 250 = 2*10^-9 = 2 нКл.
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q = W/φ.
0,5 мкДж = 0,5*10⁻⁶ Дж.
q = 0,5*10⁻⁶/250 = 2*10⁻⁹ Кл.
E = qU => q = E/U
q = 0.5 10^-6 / 250 = 0.5*10^-6 / 250 = 2*10^-9 = 2 нКл.