A doubt on self inductance and mutual inductance

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Discussion Overview

The discussion revolves around the concepts of self-inductance and mutual inductance, specifically addressing the conditions under which each phenomenon occurs and their implications for induced electromotive force (emf) in coils. The scope includes theoretical aspects of electromagnetic induction.

Discussion Character

  • Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions why a change in flux in the primary coil does not induce current in the primary coil itself when discussing mutual inductance.
  • Another participant asserts that the induced voltage in the primary coil due to its own flux is accounted for by self-inductance, while the voltage induced in the secondary coil is due to mutual inductance.
  • A participant seeks clarification on whether both self-induction and mutual induction occur when the primary and secondary coils are in close proximity.
  • Another participant confirms that self-induction always occurs, while mutual induction requires the coils to be sufficiently close to each other for coupling.

Areas of Agreement / Disagreement

Participants express differing views on the relationship between self-induction and mutual induction, with some asserting that both phenomena can occur simultaneously, while others emphasize the distinct roles of each type of induction. The discussion remains unresolved regarding the initial question about current induction in the primary coil.

Contextual Notes

Unresolved aspects include the specific conditions under which mutual induction is significant compared to self-induction, as well as the implications of these phenomena in practical applications.

ayush123
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i am having a doubt that when we find a expression for mutual inductance we say that flux change in primary coil induces emf in secondary coil. but why change in flux doesn't induce any current in primary coil also.
 
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ayush123 said:
i am having a doubt that when we find a expression for mutual inductance we say that flux change in primary coil induces emf in secondary coil. but why change in flux doesn't induce any current in primary coil also.

Who said it doesn't? It does. The voltage induced in the coil due to it's own flux is accounted for by it's self indictance while the voltage induced in another coil due to flux in the first is due to the mutual inductance.
 
u mean that when both the primary and secondary coils are at close proximity then along with mutual induction self induction also occurs. am i right.
 
Self-induction always occurs. Mutual induction occurs when components are brought in close enough proximity to allow coupling.
 

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