R1 = 12. R2=12. R3= 1800 . UB R1 R2 R3 Rx
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter17: Commercial And Industrial Air-conditioning Control Systems
Section: Chapter Questions
Problem 22RQ
Related questions
Question
Resistor Rx in the Wheatstone bridge in the picture is a wire strain sensor. The battery voltage is UB = 68 V. The value of the three resistors is as follows: R1 = 1 . R 2 = 1 . R3= 1800 .
a) Determine the sensor resistance if the instrument shows no potential difference
b) The current from the battery branches to I1 through resistor R1 and I2 through resistor R2. Determine the ratio (ratio) between the current I1 and the current I2
Transcribed Image Text:R1 = 12.
R2=12.
R3= 1800 .
UB
R1
R2
R3
Rx
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