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NEET
Exam
NEET
Subject
Physics
Chapter
Thermal Properties of Matter

NEET · Physics · Thermal Properties of Matter

Assertion (A) Rapidly changing temperatures can be measured by...

Assertion (A) Rapidly changing temperatures can be measured by thermocouples.Reason (R) The thermal capacity of the junction of a thermocouple is very small.

Options

  1. ABoth (A)(A) and (R)(R) are true and (R)(R) is not the correct explanation of (A)(A)
  2. BBoth (A)(A) and (R)(R) are true but (R)(R) is not the correct explanation of (A)(A)
  3. C(A)(A) is true but (R)(R) is false
  4. D(A)(A) is false but (R)(R) is true

Correct answer

A. Both (A)(A) and (R)(R) are true and (R)(R) is not the correct explanation of (A)(A)

Step-by-step solution

Assertion (A): Rapidly changing temperatures can be measured by thermocouples. → ✅ True (thermocouples respond quickly to temperature changes). Reason (R): The thermal capacity of the junction of a thermocouple is very small. → ✅ True (small mass and heat capacity ensure fast response). The reason is the correct explanation of the assertion. ✔ Correct Answer: (2) Both A and R are true and R is the correct explanation of A.
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