COMEDK · Physics · 2. Units and Dimensions
Which one of the following is not a tunit of Young's modulus?
- A \(\mathrm{Nm}^{-1}\)
- B \(\mathrm{Nm}^{-2}\)
- C dyne \(\mathrm{cm}^{-2}\)
- D Mega pascal
Answer & Solution
Correct Answer
(A) \(\mathrm{Nm}^{-1}\)
Step-by-step Solution
Detailed explanation
Young's modulus, \(Y=\frac{\text { Stress }}{\text { Strain }}\) Here, strain is a dimensionless quantity and stress is measured in SI unit of \(\mathrm{Nm}^{-2}\), dyne \(\mathrm{cm}^{-2}\) or pascal. So, the Young's modulus has the same unit as stress.…
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