### Discussion :: Inductors - General Questions (Q.No.57)

Chaitali Acharya said: (Dec 2, 2011) | |

Please could anyone give a formula for this question? |

Prasanna said: (Aug 20, 2012) | |

R + jXL= sqrt( 60^2 + 24^2 ) I = Vs/(R+ jXL) 2t=.862 I at 2t is = I*0.862 |

Sajid said: (Oct 13, 2012) | |

I = It*(e^(-2)) It=Vs/Z Z=(R^2+Xl^2)^1/2 Xl=2*3.14*f*L /// f=0,Since DC /// Z = R It = Vs/R =12/60 =.2 Now, I = .2(e^(-2)) = .1729 =173mA |

Sanjoy said: (Feb 29, 2016) | |

Current rise after 2 time constant. So, IL = I(1-e^-2). IL = 0.2 (1-0.13) = 173 mA. |

Sivapramod said: (Jul 17, 2016) | |

What is the value of 'e' in the given formula? |

E.Sae said: (Dec 25, 2016) | |

@Sivapramod. e means exponential |

E.Sae said: (Dec 25, 2016) | |

@Sivapramod. e means exponential |

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