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Step 1 of 4 8.011P Refer to Figure 8.7 from the text book. Consider the expression for the current transfer ratio for the identical transistors. Substitute 8 for and 1 mA for = = = 1 mA Therefore, the value of the current is, 1 Step 2 of 4 Calculate the value of the output resistance Substitute 1 mA for I₀ and 90 V for Therefore, the value of the output resistance is, Step 3 of 4 Consider the expression for the output resistance in terms of change in output voltage and change in output current. Substitute 90 kΩ and 10 V V for 90 90 = 0.1 mA Therefore, the value of the change in current is, 0.1 mA Step 4 of 4 Calculate the percentage change in the value of output current. Substitute 0.1 mA for and 1 mA for =0.1x100 =10% Therefore, he value of the percentage change in the output current is, 10%