Question

Calculate the depth of penetration of a 1 MHz wave into copper which has a conductivity \[ \sigma = 5.8\times10^7\ \text{mhos/m} \] and a permeability approximately equal to that of free space.

• A. \(0.1334\ \text{mm}\)
• B. \(0.0044\ \text{mm}\)
• C. \(0.0667\ \text{mm}\)
• D. \(0.0333\ \text{mm}\)

Hint:

Skin depth decreases when:
• Frequency increases
• Conductivity increases
• Permeability increases Higher frequency currents flow mainly near conductor surface.

Answer 1

The Correct Option is D