Electrical Resistance and Temperature Conceptual Question The electrical resista

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Electrical Resistance and Temperature Conceptual Question The electrical resistance of most materials is dependent on temperature. For many materials, the resistance decreases as the temperature of the material decreases. The data below show the resistance of a disk of YBa2Cu3O7 a hard, brittle ceramic, at temperatures between 200 ? and 240 K- (Figure 1) Part A Based on the trend of these data, predict the expected resistance R of the sample at 160 ?. Express your answer in milliohms (10 power -3 O). Part ? This question will be shown after you complete previous question(s).

Explanation / Answer

the graph shows that the dependence of Ron T is linear with slope =1/40 ohms/K

so R-9 = 1/40*(T-200) is the equation so at T =160 K

R = 9 + (1/40)*(160-200) =8 ohms

PART B

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