Application: Wheatstone BridgeSuppose the unknown resistance in Fig. 6.41 represents a str...

Application: Wheatstone Bridge

Suppose the unknown resistance in Fig. 6.41 represents a strain gauge with resistance R_x = 100 Ω under no-load conditions, while R₁ = 250 Ω and R₂ = 300 Ω. Determine R₃ under no-load conditions when the bridge is balanced and find its value when R_x = 100.25 Ω under load (a strain gauge is a device used to measure the mechanical strain of an object).

Figure 16.41 For Problem 16.10.