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MHT CET202615 April 2026Evening ShiftPhysicsSemiconductorsActual

In the diagram shown, the resistance between points A and B is ' R₁ ' when an ideal diode D is forward biased and is ' R₂ ' when ideal diode D is reverse biased. The ratio R₁ / R₂ is

Options

  1. A2
  2. B1
  3. C1 2
  4. D1 4

Correct answer

C. 1 2

Step-by-step solution

When the ideal diode D is forward biased, it acts as a short circuit with zero resistance. The circuit then consists of two 30 resistors connected in parallel between points A and B. The equivalent resistance R₁ is given by: R₁ = 30 30 30 + 30 = 15 When the ideal diode D is reverse biased, it acts as an open circuit with infinite resistance. No current flows through the top branch, so the equivalent resistance R₂ is simply the resistance of the bottom branch. R₂ = 30 The ratio R₁ R₂ is: R₁ R₂ = 15 30 = 1 2 Answer:

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