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Figure 7. This screenshot of lab data presents the I-V characteristic of a light-emitting diode (LED). The voltage is on the horizontal axis, which has linear scale from 0 to 2 V; the current is on the vertical axis, which has linear scale from 0 to 27.5 mA.The LED’s conductivity is practically zero until the voltage across the diode exceeds ~1.6 V, and rapidly grows above this limit. As already mentioned, a part of the I-V curve in Figure 7 can be approximated with a straight line, as sketched in Figure 8. Figure 8. This is a zoomed-in part of the same screenshot as in Figure 7. The straight line shows a possible linear approximation for the I-V curve in the range 1.86 – 1.96 V. Book Page 37
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