### Discussion :: Transformers - General Questions (Q.No.3)

VINAY said: (Oct 30, 2010) | |

m=1(L1+L2)^1/2 |

SURI said: (Jan 28, 2011) | |

m=k*(L1*L2)^1/2 |

Ambuj said: (Apr 6, 2011) | |

Suri what is the value of k. |

ASHA said: (Apr 20, 2011) | |

K IS THE COEFFICIENT BETWEEN TWO COILS |

Mani said: (Sep 9, 2011) | |

M=k*(L1*L2)^(1/2) where K=co-efficient of coupling that is given as K=.45 |

Xyz said: (Feb 15, 2012) | |

Coefficient of coupling (K) = 0.45 L1 = 75 mH L2 = 105 mH Mutual inductance M = k/(Root of L1 * L2) M = 0.45 / Root of L1 * L2 M= 39.9 mH |

Tito said: (Aug 1, 2013) | |

M = K*square root(L1 X L2). |

Sunil Sharma said: (Jan 10, 2014) | |

Let coefficient of coupling b/w two coils is = K. So, K = 0.45. First coil inductance(L1) = 75mh. Second " " " (L2) = 105mh. Mutual inductance(M) = k/square root of (L1*L2). M = 0.45*square root(75*105). M = 39.9. |

Bala Ram said: (Jul 14, 2016) | |

Mutual inductance formula is M = K * root(L1*L2). |

Mega.k said: (Jun 21, 2017) | |

Mutual inductance(M)=k*√(L1*L2). Formula : K=M/√(L1*L2) for finding coefficient coupling, So the answer is 0.45*88.74 = 39.9mH , M=K *√(L1*L2) for finding mutual inductance. |

Sukruth said: (Aug 3, 2018) | |

M = K * √(L1*L2). |

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