The correct answer is: D. high impedance
A series reactor is a type of inductor that is used to block AC current. It does this by creating a magnetic field that opposes the flow of current. The impedance of a series reactor is proportional to its inductance, which is the measure of its opposition to AC current. Therefore, a series reactor should have a high impedance in order to be effective in blocking AC current.
Option A is incorrect because a series reactor should have a high impedance, not a low resistance. Resistance is the measure of a material’s opposition to the flow of current, regardless of frequency. Inductance, on the other hand, is the measure of a material’s opposition to the flow of AC current. Therefore, a series reactor should have a high inductance, which will result in a high impedance.
Option B is incorrect because a series reactor should have a high impedance, not a high resistance. Resistance is the measure of a material’s opposition to the flow of current,
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