MHT CET 2025 Physics question

Not in JEE Advanced syllabus

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

(A)infinite, zero
(B)infinite, infinite
(C)zero, zero
(D)zero, infiniteCorrect

Answer: (D)

Solution

An ideal diode acts as a perfect switch. In forward bias it conducts any current with no voltage drop, so its resistance is zero (short circuit). In reverse bias it allows no current at all, so its resistance is

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Question ID VK-101267