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1. |
Which of the following is the principle of Golay cell which is used as a detector in IR spectroscopy? |
A. | expansion of gas upon heating |
B. | increase in resistance due to an increase in temperature and vice versa |
C. | temperature difference gives rise to a potential difference in the material |
D. | decrease in resistance due to an increase in temperature |
Answer» B. increase in resistance due to an increase in temperature and vice versa | |