The reactance is the ratio of:
Correct answer: A. Vrms/Irms
- A. Vrms/Irms
- B. Vrms x Irms
- C. Irms/Vrms
- D. Vmax x Vrms
Explanation
The correct option, Vrms/Irms, represents the ratio of the root mean square (rms) voltage to the root mean square (rms) current. In AC circuits, reactance is determined by this ratio. It quantifies the opposition offered by a circuit element (such as a capacitor or inductor) to the flow of alternating current. By dividing the rms voltage by the rms current, we can calculate the reactance of the circuit element. This ratio is fundamental in understanding the behavior of AC circuits and designing circuits with capacitive or inductive elements.
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About Alternating Current
Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.
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