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NTA Abhyas JEE Main2020PhysicsUnits and DimensionsPractice

If unit of length, mass and time each be doubled, the new unit of work done is _____ times the old unit of work

Options

  1. A4
  2. B6
  3. C8
  4. D2

Correct answer

D. 2

Step-by-step solution

n 2 = n 1 M 2 M 1 1 L 2 L 1 2 T 2 T 1 - 2 Given, M 2 = 2 M 1 , L 2 = 2 L 1 , T 2 = 2 T 1 ∴ n 2 = n 1 2 1 2 2 2 - 2 = 2 n 1

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