What is the dimension of strain?
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A.
[M0L0T0]
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B.
[M1L2T−2]
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C.
[M1L1T1]
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D.
[M0L3T0]
Correct Answer:
A. [M0L0T0]
Explanation:
Strain is a dimensionless quantity because it is defined as the ratio of the change in an object's dimensions to its original dimensions, such as the ratio of change in length to original length. Since it represents a ratio of two identical physical quantities, the units cancel out, resulting in no physical units or dimensions. Consequently, its dimensional formula is expressed as [M0L0T0], indicating that mass, length, and time are not present in its measurement.
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