A pn junction is part of the control mechanism for a wind

Chapter 42, Problem 42.52

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A pn junction is part of the control mechanism for a wind turbine that is used to generate electricity. The turbine has been malfunctioning, so you are running diagnostics. You can remotely change the bias voltage V applied to the junction and measure the current through the junction. With a forward bias voltage of +5.00 mV, the current is If = 0.407 mA. With a reverse bias voltage of -5.00 mV, the current is Ir = -0.338 mA. Assume that Eq. (42.22) accurately represents the currentvoltage relationship for the junction, and use these two results to calculate the temperature T and saturation current IS for the junction. [Hint: In your analysis, let x = eeV>kT. Apply Eq. (42.22) to each measurement and obtain a quadratic equation for x.]

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