JEE Main 2002 — Waves & Oscillations

If a spring has time period T, and is cut into n equal parts, then the time period of each part will be

Tube A has both ends open while tube B has one end closed, otherwise they are identical. The ratio of fundamental frequency of tube $A$ and $B$ is

Length of a string tied to two rigid supports is $40 \mathrm{~cm}$. Maximum length (wave length in $\mathrm{cm}$ ) of a stationary wave produced on it is

A tuning fork arrangement (pair) produces 4 beats / sec with one fork of frequency $288 \mathrm{cps}$. A little wax is placed on the unknown fork and it then produces 2 beats /sec. The frequency of the unknown fork is

A wave $y=a \sin (\omega t-k x)$ on a string meets with another wave producing a node at $x=0$. Then the equation of the unknown wave is

In a simple harmonic oscillator, at the mean position

When temperature increases, the frequency of a tuning fork

A child swinging on a swing in sitting position, stands up, then the time period of the swing will