When a wave propagating through a medium encounters a change in medium, then which of the following property remains the same?

(1) Speed

(2) Amplitude

(3) Frequency

(4) Wavelength

A transverse wave travels along the x-axis. The particles of medium move:

(1) Along the x-axis

(2) Along the y-axis

(3) Along the z-axis

(4) Either along the y-axis or z-axis

The phenomenon of sound propagation in the air is:

(1) An isothermal process

(2) An adiabatic process

(3) An isobaric process

(4) An isochoric process

If at STP, the velocity of sound in a gas $(\gamma =1.5)$ is 600 m/s, the RMS velocity of the gas molecules at STP will be:

(1) 400 m/s

(2) 600 m/s

(3) 600$\sqrt{2}$ m/s

(4) 300$\sqrt{2}$ m/s

In a stretched string:

(1) Only transverse waves can exist

(2) Only longitudinal waves can exist

(3) Both transverse and longitudinal waves can exist

(4) None of these

Two strings of the same material are stretched to the same tension. If their radii are in the ratio of 1: 2, then respective wave velocities in them will be in the ratio of:

(1) 4: 1

(2) 2: 1

(3) 1: 2

(4) 1: 4

A pulse is generated at the lower end of a hanging rope of uniform density and length L. The speed of the pulse when it reaches the midpoint of the rope is:

(1) $\sqrt{2gL}$

(2) $\sqrt{gL}$

(3) $\sqrt{\frac{gL}{2}}$

(4) $\frac{\sqrt{gL}}{2}$

The sound intensity level at a point 4 m from the point source is 10 dB. Then the sound level at a distance of 2 m from the same source will be:

(1) 26 dB

(2) 16 dB

(3) 23 dB

(4) 32 dB

The tones that are separated by three octaves have a frequency ratio of:

(1) 3

(2) 6

(3) 8

(4) 16