Question
What is the inductance of a circuit with a 20-millihenry inductor connected in series with a 50-millihenry inductor?
Answer Options
- A) 7 millihenries
- B) 14.3 millihenries
- C) 70 millihenries
- D) 1,000 millihenries
Correct Answer: C
Explanation
For inductors connected in series, the total inductance (L_T) is found by simply adding the individual inductances together, assuming no mutual coupling between the coils: L_T = L_1 + L_2.
Using the given values, L_1 = 20 \text{ mH} and L_2 = 50 \text{ mH}: L_T = 20 \text{ mH} + 50 \text{ mH} = 70 \text{ millihenries.} The total inductance of the series circuit is 70 \text{ millihenries}.
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