Question

5V 200 1kQ L2 1kS 2002 Examine the circuit shown above. S1 is a pushbutton switch, L1 and L2 are LEDS with Vo.on = 2V, and Q1 and Q2 are transistors with B = 100 and IVBE = 0.7 in saturation and forward active modes WW WW 9.2) (1.5 marks) Calculate the current i2 through L2 when the switch S1 is open, and closed S1 open iL2 S1 closed IL2

Answer 1

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