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4-5) Rvar Before the advent of ohmmeters (even the Runk analog ones), unknown resistances (Runk) were measured using a Wheatstone bridge. The unknown resistance is placed into the circuit at right as shown. The values of R1 and R2 are extremely well known. The resistance of Rvar is adjusted until the meter R1. -R2 reads no current in the cross branch. The value of Ryar is then read from a dial.

4-5) Rvar Before the advent of ohmmeters (even the Runk analog ones), unknown resistances (Runk) were measured using a Wheatstone bridge. The unknown resistance is placed into the circuit at right as shown. The values of R1 and R2 are extremely well known. The resistance of Rvar is adjusted until the meter R1. -R2 reads no current in the cross branch. The value of Ryar is then read from a dial.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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4-5) Before the advent of ohmmeters (even the analog ones), unknown resistances (Runk) were measured using a Wheatstone bridge. The unknown resistance is placed into the circuit at right as shown. The values of R1 and R2 are extremely well known. The resistance of Rvar is adjusted until the meter Runk. Rvar R1. R2 reads no current in the cross branch. The value of Rvar is then read from a dial. Show that Runk can be found from R1 -Ry Rukn
Transcribed Image Text:4-5) Before the advent of ohmmeters (even the analog ones), unknown resistances (Runk) were measured using a Wheatstone bridge. The unknown resistance is placed into the circuit at right as shown. The values of R1 and R2 are extremely well known. The resistance of Rvar is adjusted until the meter Runk. Rvar R1. R2 reads no current in the cross branch. The value of Rvar is then read from a dial. Show that Runk can be found from R1 -Ry Rukn
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