A series circuit has R = 12 ohm, inductive reactance 20 ohm and capacitive reactance 4 ohm. What is the impedance?
Answer and explanation
Correct answer: C. 20 ohm
- Step 1: Z = sqrt(R squared + (XL - XC) squared).
- Step 2: Z = sqrt(144 + 256) = 20 ohm.
Answer
20 ohm.
Why not the others: 36 ohm, 28 ohm and 400 ohm do not fit.
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