In pure inductance, the average power dissipated is:
Correct answer: D. Zero
- A. 1
- B. Greater than 1
- C. Less than 1
- D. Zero
Explanation
In a purely inductive circuit, the current lags the voltage by 90 degrees, resulting in a power factor of cos(90°) = 0. This means that no real power is consumed, and the average power dissipation is zero. Option D is correct because it accurately represents this scenario. The other options are incorrect because they suggest that power is dissipated, which is not the case in pure inductance.
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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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