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3. Electrical fundamentals

Three inductors 10 mH, 5 mH and 20 mH are connected in parallel. What is the total inductance?

  • Without knowing the coupling factor the total inductance cannot be found.
  • 2.86mH.
  • 1.35mH.

Explanation from PART66Online

For inductors in parallel (no mutual coupling), 1/L = 1/L1 + 1/L2 + 1/L3. Here 1/10 + 1/5 + 1/20 = 0.1 + 0.2 + 0.05 = 0.35, so L = 1/0.35 ~ 2.86mH. As with parallel resistors, the total is always less than the smallest branch (5mH), confirming the answer.

R

Richiegeee asked · 8 Dec 2015

help?

Community Comments (1)

P
PART66Online 8 Dec 2015
Hi.
Just read this article: allaboutcircuits.com/textbook/direct-...

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