JEE Main 2020 — Physics Waves & Oscillations
The displacement time graph of a particle executing SHM is given in figure: (sketch is schematic and not to scale)
Which of the following statements is/are true for this motion?
(A) The force is zero at t=43T
(B) The magnitude of acceleration is maximum at t=T
(C) The speed is maximum at t=4T
(D) The P.E. is equal to K.E. of the oscillation at t=2T
Held on 2 Sept 2020 · Verified 6 Jul 2026.
(A),(B) and (C)
(B),(C) and (D)
(A),(B) and (D)
(A)and(D)
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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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A spring-mass system oscillates with angular frequency ω. If the mass is doubled and the spring constant is halved, the new angular frequency is:
In an open organ pipe $\nu_{3}$ and $\nu_{6}$ are $3^{\text {rd }}$ and $6^{\text {th }}$ harmonic frequencies, respectively. If $\nu_{6}-\nu_{3}=2200 \mathrm{~Hz}$ then length of the pipe is $\_\_\_\_$ mm . (Take velocity of sound in air is $330 \mathrm{~m} / \mathrm{s}$.)
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Work through every JEE Main Waves & Oscillations PYQ, year by year.