Electromagnetic Induction - LR Circuit (Decay of Current)

Now Suppose from LR Circuit (Growth of Current) when current in our circuit reacheswe change the switch position from A to B , So after changing switch the current in circuit starts decaying and energy stored in inductor will convert to thermal energy.





Integrating both sides (Current changes from to i )






The Current time graph for above equation is shown below .Here the current reduces with time.


 



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Electromagnetic Induction - Mutual Induction

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As we have variable source with increasing current in primary coil ,there will be a flux change in primary coil. Due to this flux change in primary coil there will be a flux change in secondary coil and this flux change in secondary coil will generate induced emf in secondary coil. This is called mutual induction. flux linked with secondary coil depends on current in primary coil ,so they are directly proportional to each other. differentiate with respect to time both sides   ------equation 1 As per faraday law induced emf in secondary coil is  ------equation 2 substitute value from equation 1 to equation 2   Visit PHYSICS page for more blogs
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