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Skin effect results
  • a)
    Resistance in ac > resistance in dc
  • b)
    Resistance in ac = resistance in dc
  • c)
    Resistance in ac < resistance in dc
  • d)
    None of these
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Skin effect resultsa)Resistance in ac > resistance in dcb)Resistanc...
Skin effect is the tendency of an alternating electric current to become distributed within a conductor such that the current density is largest near the surface of the conductor and decreases with greater depths in the conductor.
The electric current flows mainly at the skin of the conductor, between the outer surface and a level called the skin depth. The skin effect causes the effective resistance of the conductor to increase at higher frequencies where the skin depth is smaller, thus reducing the effective cross-section of the conductor.
Hence resistance in AC is greater than resistance in DC
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