Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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Current Division Method
The generalized current divider formula is given by the following relation below,
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part F please

Problem 4: The circuit below is a common configuration that can be used to determine the value of a resistor, Rx. This is usually achieved by prescribing values for the R1 and R2 resistors, and then using an adjustable resistor (i.e., a “potentiometer") for R3. When the resistors are properly balanced, one could connect a resistor across the bridge at the points indicated by arrows and no current would flow across the resistor. Complete parts A - I. R₁ M V₂ R₂ W M R3 Part A: Using the passive sign convention, make reference marks on the circuit (current directions and polarity symbols). Where needed, assign circuit variables to the elements. Indicate nodes (A,B,C, ...) and a ground that you would use for nodal analysis. Indicate meshes that you would use for mesh analysis. Rx Part B: Suppose you want to determine the voltages across R3 and Rx very quickly. Briefly explain how this can be done by inspection (i.e., without formal analyses like nodal or mesh) by exploiting the circuit structure and indicate which features allow you to do this. (i.e., the solution by inspection, not a system of equations) Part C: Using your method, write down the voltages across R3 and Rx in terms of the circuit resistances and the battery voltage. Part D: Suppose you wanted to balance the circuit, what potential difference must exist between the two indicated points? Part E: Using your previous answers, derive the value of Rx that balances the circuit in terms of the remaining resistances. Part F: Confirm your answer by deriving the value of Rx with node-voltage analysis (i.e. from scratch).
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Transcribed Image Text:Problem 4: The circuit below is a common configuration that can be used to determine the value of a resistor, Rx. This is usually achieved by prescribing values for the R1 and R2 resistors, and then using an adjustable resistor (i.e., a “potentiometer") for R3. When the resistors are properly balanced, one could connect a resistor across the bridge at the points indicated by arrows and no current would flow across the resistor. Complete parts A - I. R₁ M V₂ R₂ W M R3 Part A: Using the passive sign convention, make reference marks on the circuit (current directions and polarity symbols). Where needed, assign circuit variables to the elements. Indicate nodes (A,B,C, ...) and a ground that you would use for nodal analysis. Indicate meshes that you would use for mesh analysis. Rx Part B: Suppose you want to determine the voltages across R3 and Rx very quickly. Briefly explain how this can be done by inspection (i.e., without formal analyses like nodal or mesh) by exploiting the circuit structure and indicate which features allow you to do this. (i.e., the solution by inspection, not a system of equations) Part C: Using your method, write down the voltages across R3 and Rx in terms of the circuit resistances and the battery voltage. Part D: Suppose you wanted to balance the circuit, what potential difference must exist between the two indicated points? Part E: Using your previous answers, derive the value of Rx that balances the circuit in terms of the remaining resistances. Part F: Confirm your answer by deriving the value of Rx with node-voltage analysis (i.e. from scratch).
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