The light-emitting diode in the circuit shown in Figure P2.64 has parameters (V_{gamma}=1.7 mathrm{~V}) and (r_{f}=0). Light

Question:

The light-emitting diode in the circuit shown in Figure P2.64 has parameters \(V_{\gamma}=1.7 \mathrm{~V}\) and \(r_{f}=0\). Light will first be detected when the current is \(I=8 \mathrm{~mA}\). If \(R=750 \Omega\), determine the value of \(V_{I}\) at which light will first be detected.

image text in transcribed