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Question

The unit of self-inductance of a coil is?


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Solution

  1. The tendency of a coil to resist changes in current in itself is known as self-inductance.
  2. The coefficient of self-inductance is defined as the ratio of back emf to the rate of change of current in the coil.
  3. The self-inductance of a coil, L=edidt(where, e = back emf, didt = rate of change of current) =VsA(where volt(V) = SI unit of magnetic flux and ampere(A) = SI unit of current, second(s) = unit of time)
  4. VsA=H(where, henry(H) = SI unit of self-inductance)

Hence, the unit of self-inductance of a coil is henry(H)


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