Which basic thermodynamic law establishes the physical concept of temperature and is the foundational basis for constructing thermometers? MCQ with Answer and Explanation
Which basic thermodynamic law establishes the physical concept of temperature and is the foundational basis for constructing thermometers?
A. First Law of Thermodynamics
B. Third Law of Thermodynamics
C. Zeroth Law of Thermodynamics
D. Second Law of Thermodynamics
Answer: Option C
Solution (By JKExamLibrary)
The Zeroth Law of Thermodynamics states that if body A is in thermal equilibrium with body B, and body B is in thermal equilibrium with body C, then A is also in thermal equilibrium with C. This transitive property implies a common physical property shared by them all, which we define as 'temperature'. A thermometer acts as body B.
Explanation:
Pascal's law: pressure applied to a confined incompressible fluid is transmitted equally and undiminished in all directions. Hydraulic lift, hydraulic brakes work on this principle. P = F₁/A₁ = F₂/A₂.
Explanation:
Joule's Law of Heating states that the heat (H) produced in a resistor is given by H = I²Rt. This indicates that the heat produced is directly proportional to the square of the electric current (I), directly proportional to the resistance (R), and directly proportional to the time (t) the current flows.
Explanation:
Galileo Galilei conducted experiments rolling balls down inclined planes and concluded that an object in motion would continue moving indefinitely on a frictionless surface. This completely challenged Aristotelian mechanics and formulated the concept of inertia, which Isaac Newton later formalized as his First Law of Motion.
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