Final answer:
To calculate the voltage Δv1 across the first capacitor, one must consider the arrangement of the capacitors in the circuit and the total voltage Δv applied.
Step-by-step explanation:
To find the voltage Δv1 across the first capacitor, we need to consider the total voltage Δv applied to the entire circuit and how this voltage is distributed across the different capacitors when they are connected either in series or in parallel. If the capacitors are connected in series, the charge Q on each capacitor is the same and the voltage Δv1 across the first capacitor would be Δv1 = Q/C1, where C1 is the capacitance of the first capacitor. However, if they are in parallel, each capacitor will have the same voltage across it as the total applied voltage; thus, Δv1 would be equal to the total voltage Δv. The specific answer depends on the arrangement of the capacitors in the circuit, which is not detailed in the question.