- Home
- General Science
Physics -- Sound
1.
Two waves travelling in a medium in the x-direction are represented by y1 = Asin(αt - βx) and y2 = Acos(βx + αt - π/4),
where y1 and y2 are the displacements of the particles of the medium,t is time, and α and β are constants. The two waves have different
- A.speeds
- B.directions of propagation
- C.wavelengths
- D.frequencies
- Answer
- Report
Answer : [B]
2.
A sine wave has an amplitude A and a wavelength λ. Let V be the wave velocity, and v be maximum velocity of a particle in the medium.
- A.V cannot be equal to v
- B.V = v, if A = λ/2π
- C.V = v, if A = 2πλ
- D.V = v, if λ= A/π
- Answer
- Report
Answer : [B]
3.
The equation y = acos2(2πnt - 2πx/λ) represents a wave with
- A.amplitude a, frequency n and wavelength λ
- B.amplitude a, frequency 2n and wavelength 2λ
- C.amplitude a/2, frequency 2n and wavelength λ
- D.amplitude a/2 frequency 2n and wavelength λ/2
- Answer
- Report
Answer : [D]
4.
A wave represented by the equation y = acos (kx - ωt) is superposed with another wave to form a stationary wave such
that the point x = 0 is a node. The equation for the other wave is
- A.asin (kx + ωt)
- B.-acos (kx - ωt)
- C.-acos (kx + ωt)
- D.-asin (kx - ωt)
- Answer
- Report
Answer : [C]
5.
Two identical strings are stretched at tensions TA and TA. A tuning fork is used to set them in vibration. A vibrates in its fundamental mode and B in its second harmonic mode.
- A.TA = 2TB
- B.TA = 4TB
- C.2TA = 2B
- D.4TA = TB
- Answer
- Report
Answer : [B]
|
|
||||||||||||||||||||||||||||
