12th Class Physics Electro Magnetic Induction Question Bank Case Based (MCQs) - Electromagnetic Induction

  • question_answer
    The unit of self-inductance is:

    A) weber ampere      

    B) \[\text{webe}{{\text{r}}^{\text{-1}}}\text{ampere}\]

    C) ohm second        

    D) farad

    Correct Answer: C

    Solution :

    (c) ohm second The magnitude of induced emf is \[\left| \varepsilon  \right|=L\frac{dl}{dt}\Rightarrow L=\frac{\left| \varepsilon  \right|dt}{dl}\] Or         \[\text{L=}\frac{\text{volt }\!\!\times\!\!\text{ second}}{\text{ampere}}\text{=ohm}\,\,\text{second}\]


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