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COMEDK2024Evening ShiftPhysicsUnits and DimensionsActual

Joule second is the unit of

Options

  1. AAngular momentum
  2. BLinear momentum
  3. CPower
  4. DEnergy

Correct answer

A. Angular momentum

Step-by-step solution

The unit of energy is Joule (J) and the unit of time is second (s). The unit Joule second (J s) corresponds to the product of energy and time. From the relation E = h , where E is energy and is frequency, the unit of Planck constant h is J s⁻¹ = J s . Angular momentum L is defined as L = mvr . The dimensional formula for angular momentum is [M L^2 T⁻¹] . The dimensional formula for energy is [M L^2 T⁻²] . Multiplying by time T , we get [M L^2 T⁻²] [T] = [M L^2 T⁻¹] . Since the dimensions of energy multiplied by tim

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