Passage V
A material is a superconductor (its electrical resistance, R, is zero) if its temperature, T, is lower than its critical temperature, Tc.
Students measured R and T for both a sample of Material X and a sample of Material Y while, each sample was cooled. They used an ohmmeter to measure R (in ohms) and a thermocouple to measure T. The thermocouple displayed the result of each measurement of T as a voltage (in millivolts, mV). Accordingly, the students plotted R versus voltage (see Figure 1). To convert voltage in mV to T in kelvins (K), they used Table 1.
24. In Table 1, as voltage decreases, temperature:
Your Answer is
Correct Answer is F
Explanation
Read the chart to see the trend, from the minimum 80 K to the maximum 149 K, the voltage has been decreasing, so it is decrease only