The equivalent inductance at seen at terminal AB is_____

- a)164
- b)104
- c)84
- d)124

Correct answer is option 'C'. Can you explain this answer?

Related Test: Test: Electrical Engineering - 1

By
Amarrana35
·
Apr 07, 2020 ·Electrical Engineering (EE)

15 Answers

Kommukuri V Rani
answered
Sep 16, 2020

If it is connected in series combination let we have to imagine it can be divided as 3

so

Lt=L1+L2+L3

I.,e LT= 3*28=84

so

Lt=L1+L2+L3

I.,e LT= 3*28=84

Shiv .
answered
Nov 03, 2020

M1, M2, M3 are the mutual inductances.

Leq= L1+L2+L3

ï¿½2M1

ï¿½2M2

ï¿½2M3

The sign conventions depend upon the dots. If dots of both mutual inductors are at positve/negative potential

like dot of L1 is at +ve terminal while the dot of L2 is at +ve terminal

then addition is done & if the dots of both mutual inductors are at either potential, like dot of L1 is at +ve terminal while the dot of L2 is at -ve terminal then subtraction is done.
Suraj Kumar
answered
3 weeks ago

Option c is correct because we can using induction in series and parallel combination

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