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Which of the following sentences are true? a. In resistive thermometer, the change in resistance of material per unit change in temperature should be as small as possible. b. Thermometers are semiconductors which behave as resistors with high positive temperature coefficient. c. Thermometers are composed of metallic oxides. d. Thermometers are used for the measurement of level flow and pressure of fluids.
Two statements are given followed by two conclusions numbered I and II. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements. Statements: All thermometers are rockets. All equipment are thermometers. Conclusions: I. Some rockets are equipment. II. Some rockets are thermometers.
In thermometers, usually mercury is used for a broad range of temperature measurements but in very cold countries alcohol is used in the thermometers. This is because of which of the following reasons?
Which the following factor causes gas thermometers to be more sensitive than the liquid thermometers?
Gas thermometers are more sensitive than the liquid thermometers because the gases
The solar radiation that is felt at the earth’s surface includes (i) Direct radiation that has passed through the atmosphere (ii) Diffuse radiation from the sky (iii) Absorbed radiation from the water Identify the correct statement
Consider the following statements:
1. The variation in an average annual range of temperature at 15° latitude of Southern Hemisphere is much less than that at 15° latitude of Northern Hemisphere.
2. At latitudes poleward of 35° the incoming radiation exceeds the outgoing radiation in. Northern Hemisphere, whereas in Southern Hemisphere the outgoing radiation exceeds the incoming radiation.
Which of the statements given above is/are correct?
Radiation pyrometers as compared to thermocouples
Which material is used when radiation pyrometers don’t produce a satisfactory result?
What does Stefan-Boltzmann law for radiation pyrometers denote?