| 摘要 |
A voltage measuring apparatus measures the voltage of a measured object and includes a detection electrode capable of being disposed facing the measured object, a variable capacitance circuit that is connected between the detection electrode and a reference potential and whose electrostatic capacitance can be changed, a voltage generating circuits that generates the reference potential, and a control unit. The control unit causes the voltage generating circuit to change the reference potential while the electrostatic capacitance of the variable capacitance circuit is being changed. A power is measuring apparatus includes the voltage measuring apparatus and a current measuring apparatus that measures current flowing in the measured object, and measures power based on the current measured by the current measuring apparatus and the voltage measured by the voltage measuring apparatus.
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