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NEET PHYSICSEasy

Dimensional formula for angular momentum is

A

ML²T⁻²

B

ML²T⁻¹

C

MLT⁻¹

D

M⁰L²T⁻²

Step-by-Step Solution

Angular momentum (LL) can be defined by the relation L=r×pL = \mathbf{r} \times \mathbf{p}, where r\mathbf{r} is the position vector and p\mathbf{p} is the linear momentum (p=mvp = mv).

  1. Identify Dimensions of Constituents: Mass (mm): [M][M] Velocity (vv): [LT1][LT^{-1}]
  • Radius/Distance (rr): [L][L]
  1. Calculate Dimensions: Substituting the dimensions into the formula L=mvrL = mvr: [L]=[M]×[LT1]×[L][L] = [M] \times [LT^{-1}] \times [L] [L]=[ML2T1][L] = [ML^2T^{-1}] Alternatively, using the relation L=IωL = I\omega (Moment of Inertia ×\times Angular Velocity): Moment of Inertia (I=mr2I = mr^2): [ML2][ML^2] Angular Velocity (ω\omega): [T1][T^{-1}] [L]=[ML2]×[T1]=[ML2T1][L] = [ML^2] \times [T^{-1}] = [ML^2T^{-1}]
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