Electromagnetic induction of two wires

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Discussion Overview

The discussion revolves around the electromagnetic induction between two parallel wires, focusing on the relationship between the magnetic field generated by a primary wire and the induced electromotive force (E) in a secondary wire. Participants explore the physical setup and the assumptions regarding the dimensions of the secondary wire.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant questions the area related to the secondary wire through which the magnetic field B passes, suggesting it may be the thickness times the length of the secondary wire.
  • Another participant notes that the secondary wire is shorter than the primary wire.
  • A later reply emphasizes the necessity of having a loop of wire for the secondary to induce any voltage and current, asking for clarification on the physical setup and context of the question.
  • One participant brings up an article discussing how lightning bolts induce voltage spikes in conductive objects, which may relate to the broader context of electromagnetic induction.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the specifics of the physical setup or the assumptions regarding the dimensions of the secondary wire. Multiple viewpoints on the requirements for induction remain present.

Contextual Notes

There are limitations regarding the clarity of the physical setup and the assumptions made about the dimensions of the secondary wire, which may affect the calculations of the induced electromotive force.

Atria
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I have two wires in parallel at a distance r apart. They are unequal in length. The current carrying primary generates a magnetic field B at distance r. What is the area related to the secondary through which B passes? Is it correct to assume the thickness times the length of the secondary? All I want to do is calculate the value of E, induced in the secondary.
 
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The secondary is shorter than the primary
 
Atria said:
I have two wires in parallel at a distance r apart. They are unequal in length. The current carrying primary generates a magnetic field B at distance r. What is the area related to the secondary through which B passes? Is it correct to assume the thickness times the length of the secondary? All I want to do is calculate the value of E, induced in the secondary.

Atria said:
The secondary is shorter than the primary

Welcome to the PF.

You need a loop of wire for the secondary to induce any voltage and current in it. What is the physical setup exactly? What is the context of the question? Can you post pictures or drawings of the setup?
 
I have read in an article, a while ago, that a lightning bolt induces voltage spikes in conductive objects i.e. lampposts plumbing systems, electrical power networks, etc.
 

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