In pure inductance, the average power dissipated is:
Correct answer: D. Zero
- A. 1
- B. Greater than 1
- C. Less than 1 but greater than zero
- D. Zero
Explanation
In a purely inductive circuit, the average power dissipated is zero. This is because the current and voltage are 90 degrees out of phase, resulting in a zero product when calculating average power over a complete cycle. The energy stored in the magnetic field is returned to the circuit, so no net power is dissipated.Option A, B, and C are incorrect because they suggest that power is dissipated, which contradicts the nature of pure inductance where energy is conserved and cycled back into the system.
This question appeared on the ETEA MDCAT 2016 paper, which you can sit online with every answer explained.
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