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ECE 201 Circuit Theory 11 Mutual Inductance in Terms of Self - Inductance L1L1 L2L2

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ECE 201 Circuit Theory 12 (Mutual Inductance) 2

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ECE 201 Circuit Theory 13

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4 Coefficient of Coupling k is known as the coefficient of coupling value lies between 0 and 1 –k = 0 when two coils have no common flux Φ 12 = Φ 21 = 0 P 12 = 0 1/k 2 = ∞ –M = 0

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ECE 201 Circuit Theory 15 Coefficient of Coupling continued –k = 1 Φ 11 and Φ 22 are both = 0 all flux linking coil1 links coil 2 can’t be using magnetic materials in the space allows conditions for k to approach 1

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