Assume the resistor in the variable branch of the bridge circuit in Figure. 1 is R = ΔR in...

Assume the resistor in the variable branch of the bridge circuit in Figure. 1 is R = ΔR instead of R = ∆R.

a) What is the expression for υo if ∆R « R?

b) What is the expression for the percent error in υo as a function of R, Rf, and ∆R?

c) Assume the resistance in the variable arm of the bridge circuit in Figure. 1 is 9810 fl and the values of R, Rf, and υin are the same as in Problem (b).What is the approximate value of υ0?

d) What is the percent error in the approximation of υo when the variable arm resistance is 9810 Ω?

Problem (b)

b) Find υo if  R1 = 470 kΩ, R = 10 kΩ, ∆R = 95 Ω, and υin = 15 V.

Figure. 1