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2. A platinum resistance thermometer has a resistance of 220Ω at 20oC. Calculate the resistance at 50oC?
2.A platinum resistance thermometer has a resistance of 220Ω at 20oC. Calculate the resistance at 50oC?
Given that a20oC=0.00392.
Rt = Ro (1+α T)
Ro is the resistance at 0˚ C
220 = Ro (1+ 0.00392.*20)
Ro = 204.01 ohm
R50 = 204.01 ( 1+ 0.00392.*50) = 244 ohm
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