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An inductance L having a resistance R is connected to an alternating source of angular frequency ω. The quality factor Q of the inductance is

1. R / ωL
2. (ωL / R)²
3. (R / ωL)¹/²
4. ωL / R

Correct answer: ωL / R

Solution

The quality factor Q of an inductor is defined as the ratio of its reactance (ωL) to its resistance (R). Hence, Q = ωL / R.

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