The self-inductance of a coil having $500$ turns is $50\,mH$. The magnetic flux through the cross-sectional area of the coil when the current through it is $8\,mA$ is found to be:

  • A
    $4 \times 10^{-4}\,Wb$
  • B
    $0.04\,Wb$
  • C
    $4\,\mu Wb$
  • D
    $40\,mWb$

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