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MHT CET202410 May 2024Evening ShiftPhysicsOscillationsActual

A simple pendulum of length ' l ' has a brass bob attached at its lower end. It's period is ' T '. A steel bob of the 'same size, having density ' x ' times that of brass, replaces the brass bob. Its length is then so changed that the period becomes ' 2 T '. What is the new length?

Options

  1. A4 / x
  2. B4 l x
  3. C4 l
  4. D2 l

Correct answer

C. 4 l

Step-by-step solution

aligned & T =2 l ~g & ~T l . aligned Time period depends only on effective length. Density has no effect on time period. If time period is made 2 times, then length becomes 4 l

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