Y₁ = 4 sin(wt + kx), Y₂ = -4 cos(wt + kx), the phase difference is ________________.

(a)

\(\frac{\pi}{2}\)

(b)

\(\frac{3\pi}{2}\)

(c)

\(\pi\)

(d)

Zero

A wave equation is y = 0.01 sin (100\(\pi t\) - kx) of wave velocity is l00m/s, its number is equal to ________________.

(a)

1 m^-1

(b)

2 m^-1

(c)

\(\pi m^{-1}\)

(d)

\(2\pi m^{-1}\)

A particle on the tough of a wave art any instant will come to the mean position after a time (7= time period) ______________.

(a)

\(\frac{T}{2}\)

(b)

\(\frac{T}{4}\)

(c)

T

(d)

2T

An organ pipe of length I vibrates in the fundamental mode, the pressure variation is maximum _______________.

(a)

at the 2 ends

(b)

at the distance l/2 inside the ends

(c)

at the distance l/4 inside the ends

(d)

at the distance l/6 inside the ends

If an experment with sonometer, a tuning fork of frequency 256 Hz resonates with a length of 25cm and another tuning fork resonates with constants the frequency of the second tuning fork is _________________.

(a)

163.84 Hz

(b)

400 Hz

(c)

320 Hz

(d)

204.8 Hz