MHT CET202410 May 2024Morning ShiftPhysicsOscillationsActual

Let ' l₁ ' be the length of simple pendulum. Its length changes to ' l₂ ' to increase the periodic time by 20 % . The ratio l₂ l₁ =

Options

A1.22
B1.33
C1.44
D1.55

Correct answer

C. 1.44

Step-by-step solution

T =2 l ~g As the periodic time increases by 20 % , aligned & T ₂= T ₁+ 20 100 T ₁= 120 100 ~T ₁ & ~T ₂ ~T ₁ = l₂ l₁ & ( ~T ₂ ~T ₁ )^2= l₂ l₁ & ( 120 ~T ₁ 100 T ₁ )^2= l₂ l₁ & 36 25 = l₂ l₁ & l₂ l₁ =1.44 aligned

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