In a 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 and voltage are 90° out of phase. The inductor stores energy from the source during one quarter-cycle and returns it completely during the next quarter-cycle. This results in zero net energy transfer and zero average power dissipation.
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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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