Physics Test 10...

In an open organ pipe of length ℓ, if the velocity of sound is v then the fundamental frequency will be :

Angle between wave velocity and particle velocity of a longitudinal wave is :

In a medium, sound travels 3 km in 10 sec and in air it travels 2 km in 3 sec. The ratio of the wavelength of sound in the two medium is :

Ultrasonic signal sent from SONAR returns to it after reflection from a rock after a lapse of 2 sec. If the velocity of ultrasound in water is 1400 m/s, the depth of the rock in water is :

Equation of a progressive wave is given by :

y = 0.2 cos π (0.04 t + 0.02 x – π/6).

The distance is expressed in cm and time in second. What will be the minimum distance between two particles having the phase difference of π/2.

Two periodic waves of intensities I₁ and I₂ pass through a region at the same time in the same direction. The sum of the maximum and minimum intensities is :

If a star emitting light of wavelength 4000 Å is moving towards earth with a velocity of 3 × 10⁶ m/s then the shift in the wavelength due to Doppler's effect will be :

A wave of frequency 500 Hz travels between point A and B and travel a distance of 1000m in 5 s. between A and B, then find number of wave present between A and B.

A 1 cm long string vibrates with fundamental frequency of 256 Hz. If the length is reduced to 1/4 cm keeping the tension unaltered, the new fundamental frequency will be :–

If in an experiment for determination of velocity of sound by resonance tube method using a tuning fork of frequency 512 Hz. First resonance was observed at 30.7 cm and second was obtained at 63.2 cm, then maximum possible error in velocity of sound is (consider actual speed of sound in air is 332 m/s) :–