A piece of platinum wire has resistance of 2.5ohm at 0°C. If it's temperature coefficient of resistance is 4×13^-3/°C find the resistance of the wire at 80°C.
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Answer:
R = 2.5ohm
dT 80-0=80C⁰
coefficient =4×10‐³C‐¹
R'=?
sol
R'= R(1+£dT)
R'= 2.5(1+ 4×10‐3×80)
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