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-...
Just read this article: allaboutcircuits.com/textbook/direct-...
Please Sign In to post a comment.
More discussions in 3. Electrical fundamentals
- If the current reaches a maximum through an inductor of 2A in 15 seconds, what is the current after 3 seconds?
- An AC inductive circuit has an inductance of 10 mH and a frequency input of 1000Hz. The opposition to current flow is approximately
- An inductor of resistance 5 kO and inductance 2mH is connected to a DC circuit. The time constant is
- A small air gap between magnetic poles results
- A starter generator has a
- An electric motor produces a force of 5 N at a distance of 0.2m from the centre of rotation and rotates at a speed of 100 revs/sec. The motors output is