I require a capacitance of 2×10^-6 F in a circuit across a potential difference of 1kV . I have a large number of 1×10^-6 F is available which can each withstand a potential of 400V. Suggest a possible arrangement that requires minimum number of capacitors.

I believe that since in series connection the potential difference is constant we'd have to consider parallel but then the net potential difference decreases and will increase the number of capacitors. But the question is minimum amount of capacitors so im kinda stuck there.