PhysicsJEE Main 28 Jan 2026, Shift 2·Q19·MCQ·Easy–moderate

Units and Measurements · Significant figures & errors

The time period of a simple harmonic oscillator is

T = 2\pi\sqrt{\dfrac{m}{k}}

. The 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 %.

(1)3.43
(2)3.35
(3)7.60
(4)6.76

We corrected a printing error in the original paper

Source printed “ $T = 2\pi\sqrt{k/m}$ ” ( $k$ and $m$ interchanged).

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Units and Measurements · Significant figures & errors

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