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AP EAMCET202123 Aug 2021Morning ShiftPhysicsAlternating CurrentActual

The reactance of an inductor at 50 ~Hz is 10 . The reactance of it at 200 ~Hz is

Options

  1. A10
  2. B40
  3. C2.5
  4. D20

Correct answer

D. 20

Step-by-step solution

Given, initial frequency, f₁=50 ~Hz Initial reactance, X₁=10 Final frequency, f₂=200 ~Hz Final reactance, X₂= ? Since, reactance, X= L =2 f L array rlrl & & X & f & & X₂ X₁ & = f₂ f₁ = 200 50 =4 & & X₂ & =4 X₁ & & =4 10=40 array

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