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MHT CET202520 Apr 2025Morning ShiftPhysicsSemiconductorsActual

For an ideal diode, in forward and reverse biased condition the resistance is respectively

Options

  1. Ainfinite, zero.
  2. Binfinite, infinite.
  3. Czero, zero.
  4. Dzero, infinite.

Correct answer

D. zero, infinite.

Step-by-step solution

An ideal diode exhibits perfect conduction under forward bias and perfect insulation under reverse bias. When forward biased, the diode behaves as a perfect conductor with zero voltage drop. Applying Ohm's law R=V/I , since V=0 for any non-zero current I , the resistance is zero. When reverse biased, the diode acts as a perfect insulator with zero current flow. Again applying R=V/I , since I=0 for any non-zero voltage V , the resistance is infinite. Conclusion: Forward bias resistance is zero, reverse bias resistan

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