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Connecting two identical capacitors in series doubles the voltage the combination can withstand provided

  • A.the two capacitors carry different charges
  • B.one of the two is shunted by a resistor
  • C.the combination is used only on direct voltage
  • D.the voltage divides equally between them

Answer: D

Equal capacitances give an equal division, so each sees half the total. In practice a slight mismatch in leakage resistance can make the division unequal on direct voltage, which is why balancing resistors are fitted across each unit of a high voltage series string.

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