Question

The resistance Rt of a metallic conductor at any temperature t is given by ___________

(a) Rt = Ro(1+ɑt)

(b) Rt = Ro(1-ɑt)

(c) Rt = Ro(ɑt-1)

(d) Rt = Ro(10+ɑt)

I have been asked this question during an interview for a job.

My doubt stems from Transducers for Body Temperature Measurement topic in section Physiological Transducers of Biomedical Instrumentation

Answer 1

The correct option is (a) Rt = Ro(1+ɑt)

For explanation I would say: The resistance Rt of a metallic conductor at any temperature t is given by Rt = Ro(1+ɑt). Ro is the resistance at 0*C. ɑ is temperature coefficient of resistivity.