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Determine DC resistance of a diode described by characteristic graph at ID = 10mA.

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Determine DC resistance of a diode described by characteristic graph at ID = 10mA.

(a) 90 Ω

(b) 111.1 Ω

(c) 101.0 Ω

(d) 100 Ω

This question was posed to me in an online quiz.

My question is from Resistance Level topic in portion Diode Circuit of Analog Circuits

1 Answer

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Right choice is (a) 90 Ω

To elaborate: Static or DC resistance is the resistance of a diode at its operating point.

That is DC resistance = 0.9/10mA = 0.9×1000/10 = 90Ω.

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