A series circuit has R = 20 ohm, inductive reactance 35 ohm and capacitive reactance 20 ohm. What is the impedance?
Answer and explanation
Correct answer: D. 25 ohm
- Step 1: Z = sqrt(R squared + (XL - XC) squared).
- Step 2: Z = sqrt(400 + 225) = 25 ohm.
Answer
25 ohm.
Why not the others: 75 ohm, 35 ohm and 625 ohm do not fit.
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