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In an LCR circuit, inductive reactance is 30 Ω and capacitive reactance 30 Ω. The resistance was found to be 40 Ω. The probable impedance of the combination is ____________.

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Question

In an LCR circuit, inductive reactance is 30 `Omega` and capacitive reactance 30 `Omega`. The resistance was found to be 40 `Omega`. The probable impedance of the combination is ____________.

Options

  • 40 `Omega`

  • 60 `Omega`

  • 100 `Omega`

  • 20 `Omega`

MCQ
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Solution

In an LCR circuit, inductive reactance is 30 `Omega` and capacitive reactance 30 `Omega`. The resistance was found to be 40 `Omega`. The probable impedance of the combination is 40 `Omega`.

Explanation:

`"X"_"L" = 30  Omega       "X"_"C" = 30  Omega`

`"R" = 40  Omega          "Z" = sqrt (40^2 + 0) = 40  Omega`

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