capacitance - Is $Q=CV$ still acceptable formular on the capacitor charged by the transformed circuit?

Assume there is a 100V to 1000V transformer and the capacitor connected in the second circuit.(You know, transformers have two circuits)

The second circuit's voltage is 1000V, but the amount current is lower than the first circuit.(because of the power conservation)

So my question is that the formula $Q=CV$ still stands in the case of decreased current?

Answer

If Q is the charge on the capacitance C and V is its voltage, yes, that relation holds.