JEE Main 2019 — Physics Waves & Oscillations
A simple pendulum oscillating in air has period T . The bob of the pendulum is completely immersed in a non-viscous liquid. The density of the liquid is 161th of the material of the bob. If the bob is inside liquid all the time, its period of oscillation in this liquid is:
Held on 9 Apr 2019 · Verified 6 Jul 2026.
2T101
2T141
4T151
4T141
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The time period of a simple harmonic oscillator is $T=2 \pi \sqrt{\frac{k}{m}}$. Measured value of mass $(m)$ of the object is 10 g with an accuracy of 10 mg and time for 50 oscillations of the spring is found to be 60 s using a watch of 2 s resolution. Percentage error in determination of spring constant $(k)$ is $\_\_\_\_$ \%.
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