Current Electricity and Electrical InstrumentHard
Question
Two resistances equal at 0oC with temperature coefficient of resistance α1 and α2 joined in series temperature coefficient of their single resistance will be:
Options
A.α1 + α2
B.
C.
D.
Solution
R1 = R0 (1 + α1t) + R0(1 + α2t)
= 2R0
= R′0
Comparing with R = R0 (1 + at)
α =
= 2R0
= R′0
Comparing with R = R0 (1 + at)
α =
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