The unknown resistance Ru in a DC bridge circuit, connected as shown in Fig. 6.4A, is a resistance thermometer. The thermometer has a resistance of 350 U at 50C and its temperature coefficient is þ1...

The unknown resistance Ru in a DC bridge circuit, connected as shown in Fig. 6.4A,

is a resistance thermometer. The thermometer has a resistance of 350 U at 50C and

its temperature coefficient is þ1 U/

C (the resistance increases as the temperature

rises). The components of the system have the following values: R1 ¼ 350 U, R2 ¼

R3 ¼ 2K U, Rm ¼ 20K U, and Vi ¼ 5V. What is the output voltage reading when

the temperature is 100C? (Hint: use Eq. 6.10).