# Compound alternating current circuits

### Explanation of question 1

The relationship between inductive reactance, impedance and resistance is

The answer is :- 3

Remember the formula for impedance in an inductor, we must rearrange it to express the formula in terms of XL

, first by squaring both sides we get

Z2 = R2 + XL2 , then

XL2 = Z2 - R2 , therefore

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