List of top Physics Questions on Wave Motion

The speed of the transverse waves on a steel wire of length 50 cm and mass 5 g subjected to a tension of 64 N is

A person at rest hears an electric siren which is stationary. Now the person accelerates at \(2\,\text{m s}^{-2}\) along a straight line path. The distance travelled by him when he hears the frequency of the siren as \(94\%\) of its original value is \((\text{speed of sound} = 330\,\text{m s}^{-1})\):

A car is approaching a cliff at a constant speed. It sounds a horn when it is at 0.9 km from the cliff. The reflected sound of the horn is heard by the car driver after 5 sec. The speed of the car is: (Velocity of sound in air is \( 330 \text{ ms}^{-1} \))

A sound source of 1000 Hz frequency approaches the observer with speed \( 20~\text{ms}^{-1} \). The observed frequency of sound is nearly: (speed of sound in air \( = 340~\text{ms}^{-1} \))

The mass and length of a string are 10 g and 100 cm respectively. If the tension in the string is increased from 400 N to 900 N, then the increase in the frequency of transverse vibration of the string is:

A transverse wave on a string is described by \(y = 3\sin(36t + 0.018x + \pi/4)\), where \(x, y\) are in cm and \(t\) in seconds. The least distance between the two successive crests in the wave is ____ \text{cm}. (Nearest integer) (\(\pi = 3.14\))}

The equation of a plane progressive wave is given by} \[ y = 5\cos\pi\left(200t - \frac{x}{150}\right) \] where \(x\) and \(y\) are in cm and \(t\) is in seconds. The velocity of the wave is ____ m/s.

Two identical strings A and B of same material are having tensions $T_{A}$ and $T_{B}$ respectively. If their fundamental frequencies are 450 Hz and 300 Hz, then $T_{A}/T_{B}$ is

An open organ pipe of length $L$ resonates at its fundamental frequency. The wavelength of the sound wave produced is

The apparent frequency of a siren increases as the source approaches a stationary observer. This phenomenon is known as

A transverse wave is represented by $y = A \sin(kx - \omega t)$. The maximum particle velocity is

A string of length \( 1 \text{ m} \) fixed at both ends vibrates in second harmonic. Wavelength is:

Two tuning forks produce frequencies \( 256 \text{ Hz} \) and \( 260 \text{ Hz} \). Number of beats per second is:

A closed organ pipe has fundamental frequency \( 100 \text{ Hz} \). Length of pipe is:

A source of sound moves towards a stationary observer with speed \( 10 \text{ m/s} \). Speed of sound = \( 340 \text{ m/s} \). If original frequency is \( 340 \text{ Hz} \), apparent frequency is:

A wave is represented by \( y = 0.1 \sin(200t - 10x) \). Find wave velocity.

The equation of a transverse wave is \( y = y_0 \sin 2\pi\left(ft - \frac{x}{\lambda}\right) \). If the maximum particle velocity be four times that of wave velocity then

2 moles of monoatomic ideal gas has temperature \(T\) and 6 moles of monoatomic ideal gas has temperature \(2T\). Find the temperature of mixture.

Assertion: EM radiation when falls on a surface exerts pressure. Reason: Radiation has no rest mass.

A wave disturbance in a medium is described by \[ y(x,t)=0.02\cos\left(50\pi t + \frac{\pi}{2}\right)\cos(10\pi x), \] where \( x,y \) are in meters and \( t \) in seconds. Which statements are correct?

The equation of a stationary wave along a stretched string is \[ y = 5\sin\left(\frac{\pi x}{3}\right)\cos(40\pi t), \] where \( x,y \) are in cm and \( t \) in seconds. The separation between two adjacent nodes is

The variation of displacement with time of a simple harmonic motion is \[ y = 2\sin\left(\frac{\pi t}{2}+\phi\right)\text{ cm}. \] The maximum acceleration of the particle is

Statement-1: Kinetic energy of system = \( \frac{1}{2} m_1 v_1^2 + \frac{1}{2} m_2 v_2^2 + \dots + \frac{1}{2} m_n v_n^2 \) Statement-2: Kinetic energy of system = Kinetic energy of center of mass + kinetic energy with respect to center of mass.

The principle of superposition in wave motion states that ________.