4. A device can be modeled by a voltage source in series with a resistance. This device has the relationship between voltage and current shown in Figure P3.4a, using the reference vD iD polarities shown in Figure P3.4b. This relationship holds for all values of and When this vD iD. device is connected to a 12[V] voltage source as shown in Figure P3.4c, find the power absorbed by the device. 5. A device, shown in Figure P3.5a, can be modeled by a current source in parallel with a resistance. The relationship between the current through the device, and the voltage across iX, the device, is given in the plot in Figure P3.5b. vX, a) Find a model for the device that would be valid when current is in the range 1[mA] < < 5[mA]. This model must have numerical values for the current and resistance, iX and the polarities with respect to and should be shown in a diagram. vX iX b) A voltage source is applied across the device so that = 10[V]. Find the power delivered vX by the device in this situation. 6. Use the circuit given below to solve for the numerical quantities requested. a) Find the equivalent resistance of this circuit as seen from terminals A and B. b) Find the equivalent resistance of this circuit as seen from terminals A and C. 7. Use the circuit given below to solve for the numerical quantities requested. a) Find the equivalent resistance of this circuit with respect to terminals A and B. b) Find the equivalent resistance of this circuit with respect to terminals A and C. Numerical Solutions 1. a) 30.51[mW] b) 5.61[V] 2. = 8.851 [W] pabs,10/ Ω / 3. = -0.6481 [V] v3 4. Solution omitted 5. Solution omitted
4. A device can be modeled by a voltage source in series with a resistance. This device has the relationship between voltage vD and current iD shown in Figure P3.4a, using the reference polarities shown in Figure P3.4b. This relationship holds for all values of vD and iD. When this device is connected to a 12[V] voltage source as shown in Figure P3.4c, find the power absorbed by the device. 5. A device, shown in Figure P3.5a, can be modeled by a current source in parallel with a resistance. The relationship between the current through the device, iX, and the voltage across the device, vX, is given in the plot in Figure P3.5b. a) Find a model for the device that would be valid when current is in the range 1[mA] < iX < 5[mA]. This model must have numerical values for the current and resistance, and the polarities with respect to vX and iX should be shown in a diagram. b) A voltage source is applied across the device so that vX = 10[V]. Find the power delivered by the device in this situation. 6. Use the circuit given below to solve for the numerical quantities requested. a) Find the equivalent resistance of this circuit as seen from terminals A and B. b) Find the equivalent resistance of this circuit as seen from terminals A and C. 7. Use the circuit given below to solve for the numerical quantities requested. a) Find the equivalent resistance of this circuit with respect to terminals A and B. b) Find the equivalent resistance of this circuit with respect to terminals A and C. Numerical Solutions 1. a) 30.51[mW] b) 5.61[V] 2. pabs,10/ Ω / = 8.851 [W] 3. v3 = -0.6481 [V] 4. Solution omitted 5. Solution omitted
2201_Homework_05.docx