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The Wheatstone Bridge. The circuit shown in below Fig,

University Physics | 13th Edition | ISBN: 9780321675460 | Authors: Hugh D. Young, Roger A. Freedman ISBN: 9780321675460 31

Solution for problem 81P Chapter 26

University Physics | 13th Edition

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University Physics | 13th Edition | ISBN: 9780321675460 | Authors: Hugh D. Young, Roger A. Freedman

University Physics | 13th Edition

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Problem 81P

The Wheatstone Bridge.? The circuit shown in below Fig, called a ?Wheatstone bridge?, is used to determine the value of an unknown resistor ?X? by comparison with three resistors ?M?, ?N?, and ?P? whose resistances can be varied. For each setting, the resistance of each resistor is precisely known. With switches K1 and K2 closed, these resistors are varied until the current in the galvanometer G is zero; the bridge is then said to be ?balanced.? (a) Show that under this condition the unknown resistance is given by ?X = MP/N.? ( This method permits very high precision in comparing resistors.) (b) If the galvanometer G shows zero deflection when ?M? = 850.0 ?, ?N? = 15.00 ? and ?P? = 33.48 ?. What is the unknown resistance ?X?? Figure:

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Psych 2300: Psychology Research Methods 6/15/16 Chapter 3: Claims and Validities Tools for Interrogating Research Part 1: Variables Variable: anything that takes on multiple (at least 2) levels Independent variable: taking on multiple levels manipulated by experimenter: manipulated Dependent variable: taking on multiple levels affected by the independent variable; measured Constant: has more than one level, but is SET TO ONLY ONE LEVEL Independent: Left handed or right handed Dependent: Handwriting Constant: writing on college ruled paper or papyrus [Variable=paper type  can take on multiple levels; setting it to one level] Conceptual variables : variables that cannot be measured out directly; they are abstract - [CON

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Textbook: University Physics
Edition: 13
Author: Hugh D. Young, Roger A. Freedman
ISBN: 9780321675460

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The Wheatstone Bridge. The circuit shown in below Fig,