The resistance R0 and Rt of a metallic wire at temperatures 0° C and t° C are related as (a is the temperature coefficient of resistance).
A. Rt = R0(1 + αt)
B. Rt = R0(1 – αt)
C. Rt = R0(1 + αt)2
D. Rt = R0(1 – αt) 2
Answer:A
The resistance R0 and Rt of a metallic wire at temperatures 0° C and t° C are related as (a is the temperature coefficient of resistance).
A. Rt = R0(1 + αt) B. Rt = R0(1 – αt) C. Rt = R0(1 + αt)2 D. Rt = R0(1 – αt) 2