Verified Solution • 2025–26 Session moderate

QJEEM20Ph5a16: JEE Main 2020 Physics - Class 11 JEEM20Ph5a16 Solution: A simple pendulum is being used to determine th value of…

A simple pendulum is being used to determine th value of gravitational acceleration g at a certain place. Th length of the pendulum is 25.0 cm and a stop watch with 1s resolution measures the time taken for 40 oscillations to be 50 s. The accuracy in g is :

Multiple Choice Options

  • A 4.40%
  • B 3.40%
  • C 2.40%
  • D 5.40%

Step-by-Step Verified Solution

T = 2πlg

⇒ g=4π2lT2

⇒ Δgg=Δll+2ΔTT

= 0.125+2150 = 11250

∴ % accuracy = 11250 × 100% = 4.40 %

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