The power consumed in a purely inductive AC circuit is.
Correct answer: A. Zero
- A. Zero
- B. V × Irms
- C. Vrms / Irms
- D. Vrms2 / R
Explanation
In purely inductive circuit, the phase difference between voltage and current is 90°, so P = VI cosφ = VI cos 90° =0.
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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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