The arms of a Wheatstone bridge ABCD have the following resistances: AB: R, = 1.000 ± 1.0% BC: R; = 100 + 0.5% CD: unknown resistance Ry DA: R, = 432.5 ± 0.29% Determine the value of the unknown resistance and its accuracy of measurement. R3 B D R2 Rx

The arms of a Wheatstone bridge ABCD have the following resistances: AB: R, = 1.000 ± 1.0% BC: R; = 100 + 0.5% CD: unknown resistance Ry DA: R, = 432.5 ± 0.29% Determine the value of the unknown resistance and its accuracy of measurement. R3 B D R2 Rx

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter7: Parallel Circuits

Section: Chapter Questions

Problem 3PP: Using the rules for parallel circuits and Ohmslaw, solve for the missing values....

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Concept explainers

Thermistors

A thermistor is a special type of resistor whose resistance is more temperature-dependent than standard resistors. The resistance of the thermistor decreases with increasing temperature. This is the basic principle of thermistors. This allows the thermistor circuit to detect very small temperature changes that cannot be observed with the Resistance temperature detectors (RTDs) or the thermocouples. Since the resistance of a thermistor is temperature dependent, it can be connected to an electrical circuit to measure body temperature. This high sensitivity to temperature changes makes thermistors very useful for accurately controlling and calibrating temperature measurements. In general, resistance increases with increasing temperature in most metals, but thermistors react negatively.

Question

Hi could i please have the workings out and answer for the question attached.

If possible could you write down any formulas used.

Thank you! :)

The arms of a Wheatstone bridge ABCD have the following resistances:
AB: R, = 1,000 + 1.0%
BC: R; = 100 ± 0.5%
CD: unknown resistance Ry
DA: R3 = 432.5 + 0.2%
Determine the value of the unknown resistance and its accuracy of measurement.
R3
B
R2
Rx

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