Question
What unit is used to measure reactance?
Answer Options
- A) Farad
- B) Ohm
- C) Ampere
- D) Siemens
Correct Answer: B
Explanation
Reactance (X) is the opposition offered by inductors and capacitors to the flow of Alternating Current (AC). Although reactance stores energy rather than dissipating it, it is a component of the overall impedance (Z) and behaves mathematically like a resistance.
Therefore, the unit used to measure reactance (both inductive X_L and capacitive X_C) is the Ohm. When combined with resistance (R), reactance forms the total impedance: Z = R \pm jX, which is also measured in ohms.
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