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The threshold voltage of a diode at Antarctica and India were found to be V1 and V2 respectively. Which of the following relations between V1 and V2 hold good?

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The threshold voltage of a diode at Antarctica and India were found to be V1 and V2 respectively. Which of the following relations between V1 and V2 hold good?

(a) V1 > V2

(b) V1 = V2

(c) V1 < V2

(d) Can’t be determined

This question was posed to me in semester exam.

This interesting question is from Diode Basics and Equivalent Circuits in chapter Diode Circuit of Analog Circuits

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The correct answer is (a) V1 > V2

To explain I would say: Temperature in India is greater than that in Antarctica. Hence, the reverse saturation current measured in India will be higher as compared to that measured in Antarctica. Now, as Is and VT are inversely related, V1 >V2.

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