Physics

Two strings of copper are stretched to the same tension. If their cross-section area are in the ratio 1 : 4 , then the respective wave velocities will be in the ratio then the respective wave velocities will be in the ratio Two strings of copper are stretched to the same tension. If their cross-section [...]

What should be the maximum acceptance angle at the aircore interface of an optical fibre if n1 and n2 are the refractive indices of the core and the cladding, respectively-duplicate-1-duplicate-1 respectively What should be the maximum acceptance angle at the aircore interface of an optical fibre if n1 and n2 are the refractive indices of [...]

A sound is produced between two vertical parallel walls. the echo from one walls is heard after 2s while from the other 2s after the first echo. The speed of sound in the air is 340 m/s. A sound is produced between two vertical parallel walls. the echo from one walls is heard after 2s [...]

A pulse of sound wave travels a distance l in helium gas in time T at a particular temperature. If at the same temperature a pulse of sound wave is propagated in oxygen gas, it will cover the same distance l in time. A pulse of sound wave travels a distance l in helium gas [...]

The extension in a string, obeying Hooke’s law, is x. The speed of sound in the stretched string is v. If the extension in the string is increase to 1.5 x, the speed of transverse waves in it will be: is x. The speed of sound in the stretched string is v. If the extension [...]

The velocity of sound through a diatomic gaseous medium of molecular weight M at 0 degree C The velocity of sound through a diatomic gaseous medium of molecular weight M at 0 degree C November 1, 2020 Category: Arihant Physics by D.C Pandey , Chapter 16 - Waves , Volume 1 ,

If the temperature of the medium drops by 1 %, the velocity of sound in that medium If the temperature of the medium drops by 1 % the velocity of sound in that medium November 1, 2020 Category: Arihant Physics by D.C Pandey , Chapter 16 - Waves , Volume 1 ,

Under the same conditions of pressure and temperature, the velocity of sound in oxygen and hydrogen gases are vo and vH , then the velocity of sound in oxygen and hydrogen gases are vo and vH then Under the same conditions of pressure and temperature November 1, 2020 Category: Arihant Physics by D.C Pandey , [...]

Intensity level of intensity l is 30 dB. The ratio I/I0 is (where I0 is the threshold of hearing) Intensity level of intensity l is 30 dB. The ratio I/I0 is (where I0 is the threshold of hearing) November 1, 2020 Category: Arihant Physics by D.C Pandey , Chapter 16 - Waves , Volume 1 [...]

If frequency of sound produced by a siren increases from 400 to 1200 Hz while the wave amplitude remains constant, the ratio of intensity of the 1200 Hz to that of 400 Hz wave will If frequency of sound produced by a siren increases from 400 to 1200 Hz while the wave amplitude remains constant [...]