R G R R2 Consider the circuit above. The unknown resistance, R can be related to...
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R G R R2 Consider the circuit above. The unknown resistance, R can be related to the known resistances R1, R2 and R3. In this experiment both R2 and R3 will be variable resistors, but only one needs to be. The galvanometer G is a sensitive, low internal resistance device for measuring small currents. In order to use the Wheatstone bridge, we adjust the variable resistors until the current through the galvanometer is zero. In such a case using Kirchhoff's rules, we can show that the unknown resistance can be expressed in terms of the three known resistances by the formula R3 R = R1. R2 1. Use Kirchhoff's rules to derive equation (1). Be sure to show your work. (1) R G R R2 Consider the circuit above. The unknown resistance, R can be related to the known resistances R1, R2 and R3. In this experiment both R2 and R3 will be variable resistors, but only one needs to be. The galvanometer G is a sensitive, low internal resistance device for measuring small currents. In order to use the Wheatstone bridge, we adjust the variable resistors until the current through the galvanometer is zero. In such a case using Kirchhoff's rules, we can show that the unknown resistance can be expressed in terms of the three known resistances by the formula R3 R = R1. R2 1. Use Kirchhoff's rules to derive equation (1). Be sure to show your work. (1)
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Related Book For
Differential Equations and Linear Algebra
ISBN: 978-0131860612
2nd edition
Authors: Jerry Farlow, James E. Hall, Jean Marie McDill, Beverly H. West
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