Question #238921

A single layer of No. 24 WGA (dia=0.0201) commercial iron wire is wound over a ceramic tube whose diameter is 3.25 in if the total wire resistance is 41 ohms, determine the number of turns.

Expert's answer

Solution

Given data

Diameter (d)=0.0201 in

Resistance (R)=41"\\Omega"

Circumference of ceramic tube(c)"=\\pi D"

="\\pi\\frac{3.25}{12}=0.85ft" =1turn

And CM="\\frac{0.021}{0.001}=404.01mil^2"

Resistance

"R=\\rho \\frac{L}{CM}"

"L=R\\frac{CM}{\\rho}=\\frac{41\\times404.01}{75}=221ft"

No. of turns

"N=\\frac{L}{C}=\\frac{221}{0.85}=259.83"

"N=260"

Therefore number of turns are 260.

Learn more about our help with Assignments: Electrical Engineering

## Comments

## Leave a comment