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MHT CET202210 Aug 2022Morning ShiftPhysicsAlternating CurrentActual

The coil of inductance 0.25 mH has a reactance of 330 , when connected to an a.c. source. The frequency of a.c. source is (Take . = 22 7 )

Options

  1. A210 kHz
  2. B105 kHz
  3. C420 kHz
  4. D330 kHz

Correct answer

A. 210 kHz

Step-by-step solution

We know inductive reactance is given by X_L=2 f L , where f is the frequency of the source and L the inductance of the coil. f= X_L 2 L Given, L=0.25 mH and C=330 , f= 330 2 (0.25 mH ) =210 kHz

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