Questions
Two resistances R1 and R2 are made of different materials. The temperature coefficient of the material of R1 is a and of the material of R2 is . The resistance of the series combination of R1 and R2 will not change with temperature, if R1/R2 equals
detailed solution
Correct option is D
R1+R2=R1 1+αt + R2 1−βt⇒R1+R2=R1 +R2+R1αt−R2βt⇒ R1R2=βαTalk to our academic expert!
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