ISRO Electronics & Communication (ECE) 2010 - Question 40

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Topic: Electronics Engineering

For a particular toroidal inductor core, the inductance value obtained for 50 turns is 200 µH. If two such inductors are wired in parallel, the resulting inductance is

  • A. 200 µH
  • B. 50 µH
  • C. 400 µH
  • D. 100 µH

Answer: D. 100 µH

Explanation: If two identical inductors of 200 µH are connected in parallel, assuming no mutual coupling, the equivalent inductance is $L_{eq} = \frac{L_{1} \times L_{2}}{L_{1} + L_{2}} = \frac{200 \times 200}{200 + 200} = 100~\mu H$.

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