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A R3 www Ri B Switch D HF Rx mag R₂ a) An unknown length of platinum wire 0.920 mm in diameter is placed as the unknown resistance in a Wheatstone bridge (see the above figure). Arms 1, 2 and 3 have resistance of 38 ohms, and 46 ohms respectively. Balance is achieved when R, is 3.48 ohms. How long is the platinum wire?

A R3 www Ri B Switch D HF Rx mag R₂ a) An unknown length of platinum wire 0.920 mm in diameter is placed as the unknown resistance in a Wheatstone bridge (see the above figure). Arms 1, 2 and 3 have resistance of 38 ohms, and 46 ohms respectively. Balance is achieved when R, is 3.48 ohms. How long is the platinum wire?

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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A R3 www Ri + B Switch D -w F Rx R₂ C a) An unknown length of platinum wire 0.920 mm in diameter is placed as the unknown resistance in a Wheatstone bridge (see the above figure). Arms 1, 2 and 3 have resistance of 38 ohms, and 46 ohms respectively. Balance is achieved when R, is 3.48 ohms. How long is the platinum wire?
Transcribed Image Text:A R3 www Ri + B Switch D -w F Rx R₂ C a) An unknown length of platinum wire 0.920 mm in diameter is placed as the unknown resistance in a Wheatstone bridge (see the above figure). Arms 1, 2 and 3 have resistance of 38 ohms, and 46 ohms respectively. Balance is achieved when R, is 3.48 ohms. How long is the platinum wire?
Expert Solution
Step 1: Given data :-
  • R1 = 38 ohm
  • R2 = 46 ohm
  • R3 = 3.48 ohm
  • D = 0.920 mm

Required data :- 

  • Length of platinum wire = L = ?
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