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Normal mercury thermometer can be used to measure a temperature of about 300°C. However, its maximum temperature measurement range can be increased upto about 500°C by | |
A. | filling nitrogen under pressure in the stem. [Correct Answer] |
B. | increasing the diameter of the tube. [Wrong Answer] |
C. | using steel tube in place of glass tube. [Wrong Answer] |
D. | accounting for the tube expansion. [Wrong Answer] |