Tuesday, September 29, 2020

POWER SYSTEM MCQ

MCQ-5- If the frequency is increased, then skin effect will

increases
decreases
remains unaffected
any of the above

ANS: increases
HINT:
kin effect ∝ 1/skin depth skin depth = 1/√(πfµσ) Where, f = frequency µ = permeability σ = conductivity Therefore, Skin effect ∝ √(πfµσ) If frequency is increased, skin depth will decrease and skin effect will increases.

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