For the circuit given below, the inductance measured across the terminals 1 and 2 was 15 H with open terminals 3 and 4. It was 30 H when terminals 3 and 4 were short-circuited. Both the inductors are having inductances 2H. The coefficient of coupling is ______________
(a) 1
(b) 0.707
(c) 0.5
(d) Inderminate due to insufficient data
This question was addressed to me by my school principal while I was bunking the class.
My doubt is from Advanced Problems on Magnetically Coupled Circuits in section Resonance & Magnetically Coupled Circuit of Network Theory
Select the correct answer from above options
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