rt A - Calculating the output voltage of a summing op amp circuit For the circuit shown, determine V₁ when R₁ = 8.8 kn. R₂ = 5.8 kn. R3 = 6.0 kn, RF = 100 kn V₁ = 10 mV, V₂ = 50 mV, V3 = 70 mV, and Vcc = 15 V. Express your answer to four significant figures and include the appropriate units. You did not open hints for this part. ANSWER: Vo =

25. Consider the circuit diagram depicted in the figure. R₂ 2.5- E1-18 V R₁ a M 0.5 Ω E₂ = 45 V 0.50 R₁₂ 1.50 (a) If the current through the top branch is 12 = 0.02 A, what is the current through the bottom, /3, in amps? [Ans: 13=13.53 A]

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Assume that the ideal op amp in the circuit in the figure is operating in its linear region, Take that R₁ = 45 k and R₂ = 18 kn. Part A Calculate the power delivered to the R₂. Express your answer with the appropriate units. ANSWER: PR₂ Express your answer with the appropriate units. ANSWER: PR₂ Part C Find the ratio of the power found in Part A to that found in Part B. ANSWER: 320mV Part B Calculate the power delivered to the R₂ with the op amp removed from the circuit, that is, with the R₂ resistor connected in the series with the voltage source and the R₁ resistor. PA/PB = + Source: Load