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COMEDK2017PhysicsUnits and Dimensions

Which one of the following is not a tunit of Young's modulus?

Options

  1. ANm ⁻¹
  2. BNm ⁻²
  3. Cdyne cm ⁻²
  4. DMega pascal

Correct answer

A. Nm ⁻¹

Step-by-step solution

Young's modulus, Y= Stress Strain Here, strain is a dimensionless quantity and stress is measured in SI unit of Nm ⁻² , dyne cm ⁻² or pascal. So, the Young's modulus has the same unit as stress. Nm ⁻¹ is not a unit of Young's modulus.

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