Physics Test 14...

A YDSE experiment is used to measure the wavelength of light used. The distance between screen and slits is measured by a meter scale with least count 1mm. The measured distance is 1.500 m. The distance between the slits is measured by a micrometer of least count 0.01 mm. The distance between slits is measured to be 0.33 mm. The fringe width is measured by the same micrometer. It comes out to be 2.50 mm. The wavelength of light is :-

In an experiment to measure the speed of sound by a resonating air column, a tuning fork of frequency 500 Hz is used. The length of the air column is varied by changing the level of water in the resonance tube. Two successive resonances are heard at air columns of length 49.0 cm and 82.2 cm. The end correction is :-

How long will it take for the sound wave to travel a distance 1m from point P to point Q, If the temperature between these two points changes linearly from T₀ to 4T₀ and the velocity of sound propagation in air is  where K is a constant

Two sound waves of slightly different frequencies have amplitude ratio 11/9. What is the difference of sound levels in decibels of maximum and minimum intensities heard at a point ?

Standing waves are set up in a string of length 240cm clamped horizontally at both ends. The separation between any two consecutive points where displacement amplitude is 3√2cm is 20cm. The standing waves were set by two travelling waves of equal amplitude of 3 cm. The overtone in which the string is vibrating will be :-

A transverse harmonic wave represented by  travels along a string towards a boundary at x = 0, with a 2^nd string. The speed of wave in 2^nd string is half of speed of wave in string 1. Then the equation of reflected wave is : 

A uniform but heavy rope of length L is suspended from a ceiling. A small transverse disturbance is produced at bottom. The ratio of time taken to travel upper half to time taken to travel lower half of the string is :

The correct statement are :

Rank the vernier callipers/screw gauge in the order of their increasing precision :

(1) Screw gauge having main scale division 1mm and no. of circular division = 200.

(2) Screw gauge having main scale division 0.5 mm and no. of circular division = 400.

(3) Vernier callipers having main scale division = 1mm such that 9 MSD = 10 VSD.

(4) Vernier callipers having main scale division = 1mm such that 4 MSD = 5 VSD.

An observer moves away from a linear source of sound. The loudness level decreases by 10 dB when the distance of observer from source :-