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Using the npn transistor model of Fig. 6.5(b), consider the case of a transistor for which the base is connected to ground, the collector is connected to a 10-V dc source

through a 2-k2 resistor, and a 3-mA current source is con- nected to the emitter with the polarity so that current is drawn out of the emitter terminal. If ß= 100 and I = 10-¹5 A, find the voltages at the emitter and the collector and calculate the base current.