Star moving towards the earth show

• Red shift A
• Blue shift B
• Green shift C
• Yellow shift D

The distance covered by wave in 1 sec is

• wavelength A
• Wave number B
• Wave speed C
• Frequency D

When ever the path difference between the waves is integral multiple of half the wavelength, interference will be

• Constructive A
• Destructive B
• (-)ve C
• (+) ve D

In which medium the speed of sound is greater.

• Oxygen A
• Air B
• Water C
• copper D

the velocity of sound is maximum at 20 ^oC in

• Lead A
• Copper B
• Glass C
• Iron D

A set of frequencies which are multiples of the fundamental frequency are called.

• Doppler effect A
• Nodal frequencies B
• Beat frequencies C
• Hamonics D

The mechanism of transports energy of all the waves is

• Different A
• Same B
• Complicated C
• Easy D

The speed of sound in air would become double than ots speed at 10 ^oC at a temperature of.

• 313 ^oC A
• 586 ^oC B
• 859 ^oC C
• 899 ^oC D

The experimental value for the velocity of sound in air is

• 233 m-sec^-1 A
• 333 m-sec^-1 B
• 433 m-sec^-1 C
• 533 m-sec^-1 D

Sound travel faster in

• CO2 A
• H2 B
• O2 C
• He D

• 
  A
• 
  B
• 
  C
• 
  D

The state of human blood flow can be found by using.

• Newton's formula of speed of sound A
• Interference of sound B
• Phenomena of beats C
• Doppler's effect of sound D

The speed \velocity of sound is greatest in.

• Air A
• Steel B
• Ammonia C
• Water D

In transverse waves the particles of medium vibrate

• Along the direction of wave A
• Opposite to direction of wave B
• Perpendicular to direction of wave C
• Slowly D

Increase in the velocity of sound in air for 1 ^oC rise in temperature is.

• 61 ms-1 A
• 0.61 ms-1 B
• 161 ms-1 C
• 261 ms-1 D

The distance between two consecutive crest is called.

• Displacement A
• Amplitude B
• Wave front C
• Wavelength D

Beats can be heard when difference of frequency is not more than.

• 8 Hz A
• 10 Hz B
• 4 Hz C
• 6 Hz D