Questions
Two wires of resistance R1 and R2 have temperature coefficient of resistance and respectively. These are joined in series. The effective temperature coefficient of resistance is
detailed solution
Correct option is C
Rt1=R11+α1t and Rt2=R21+α2tAlso Req. =Rt1=Rt2⇒Req. =R1+R2+ R1α1+R2α2t⇒Req =R1+R2 1+ R1α1+R2α2R1+R2.tSo αeff = R1α1+R2α2R1+R2Talk to our academic expert!
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