How to find the turns ratio between the primary and secondary coils.

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Homework Help Overview

The discussion revolves around determining the turns ratio of a transformer based on the requirement for a spark to jump a 5.00 mm gap between two points, A and B, across the secondary coil. The primary coil's frequency and voltage are provided, but the original poster expresses uncertainty about how to begin solving the problem.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants explore the necessary potential difference between points A and B for a spark to occur. There is a mention of the dielectric constant of air and its relation to the distance AB, indicating a conceptual link between physical properties and the problem at hand.

Discussion Status

The discussion is ongoing, with participants providing insights into the relationship between the potential difference and the physical gap. Some guidance has been offered regarding the dielectric properties of air, but no consensus or complete solution has been reached.

Contextual Notes

The original poster has expressed confusion and a lack of direction in approaching the problem, indicating that they have received an answer previously but without understanding the underlying solution process.

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Homework Statement



Find the turns ratio across the transformer such that a spark is given off at the points AB. The distance from point A to point B is 5.00 mm.

AB is the distance across the secondary coil.

The frequency and voltage of the primary coil is given.

Homework Equations



N_p /N_s = V_p / V_s = I_s /I_p


The Attempt at a Solution



I don't know where to start. I got it wrong. I was given the answer, but not the solution to the problem. Could I get some help on where to start?
 
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What potential must exist between points A and B in order for a spark to jump the gap?
 
gneill,

Thanks for helping. I honestly don't know what I was thinking. I knew the potential of the secondary coil had to be the dielectric constant of air multiplied by the distance AB.
 
nontradstuden said:
gneill,

Thanks for helping. I honestly don't know what I was thinking. I knew the potential of the secondary coil had to be the dielectric constant of air multiplied by the distance AB.

I think you mean the dielectric breakdown strength of air :smile:
 

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