GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Length / centimeter
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Mass / gram
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Time / hour
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Temperature / kelvin
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Detailed explanation-1: -The kelvin is the SI unit of thermodynamic temperature, and one of the seven SI base units . Unusually in the SI, we also define another unit of temperature, called the degree Celsius (°C).
Detailed explanation-2: -The SI unit of momentum (P) is kilogram meter per second (kg⋅ m/s) The SI unit of the magnetic field (B) is Tesla. The SI unit of heat is the unit joule. The SI unit of velocity is m/s.
Detailed explanation-3: -Therefore, the correct pair of physical quantity and S.I. unit is temperature-kelvin.
Detailed explanation-4: -But, when we see it from the perspective of science, Kelvin is the most preferred unit of temperature. Kelvin scale is an absolute zero temperature scale and the minimum temperature that it can have is 0K. Thus Kelvin scale does not give any negative values. This makes Kelvin scale to be convenient for use.
Detailed explanation-5: -kelvin is a derived unit in SI.