The reactance of a coil when used in the domestic ac power supply ( 220 V – 50 Hz) is 100Ω. The self-inductance of the coil is nearly :

The reactance of a coil when used in the domestic ac power supply ( 220 V - 50 Hz) is 100Ω. The self-inductance of the coil is nearly :

  1. A

    3.2 henry

  2. B

    0.32 henry

  3. C

    2.2 henry

  4. D

    0.22 henry

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    Solution:

    XL=ωL=2πfL L=XL2πf=1002π×50=0.32 Henry

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