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NEET
Exam
NEET
Subject
Physics
Chapter
Mechanical Properties of Solids

NEET · Physics · Mechanical Properties of Solids

Assertion (A): Strain is a unit-less quantity. Reason (R): Strain...

Assertion (A): Strain is a unit-less quantity. Reason (R): Strain is equivalent to force.

Options

  1. ABoth AA and RR are true and RR is the correct explanation of AA.
  2. BBoth AA and RR are true but RR is not the correct explanation of AA.
  3. CAA is true but RR is false.
  4. DA is false but R is true.

Correct answer

C. AA is true but RR is false.

Step-by-step solution

Strain is defined as the ratio of change in dimensions of the body to the original dimensions. Since it is a ratio of two quantities with the same units, strain is indeed a unit-less quantity. Therefore, Assertion (A) is true. However, strain is a measure of deformation, while force is a push or pull. They are entirely different physical quantities and are not equivalent. Thus, Reason (R) is false.
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