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Two sources are at a finite distance apart. They emit sound of wavelength λ . An observer situated between them on line joining the sources, approaches towards one source with speed u, then number of beats heard per second by observer will be approaches towards one source with speed u then number of beats heard [...]

Block M slides down on frictionless incline as shown. The minimum friction coefficient so that m does not slide with respect to M would be : Block M slides down on frictionless incline as shown. The minimum friction coefficient so that m does not slide with respect to M would be : August 25, 2020 [...]

In Young’s double slit experiment, the fringes are displaced by a distance x when a glass plate of refractive index 1.5 is introduced in the path of one of the beams. When this plate is replaced by another plate of the same thickness, the shift of fringes is (3/2) x. The refractive index of the [...]

Two waves are approaching each other with a velocity of 20 m/s and frequency n. The dist nodes is Two waves are approaching each other with a velocity of 20 m/s and frequency n. The dist nodes is August 25, 2020 Category: Chapter 16 - Waves , NEET Last 32 Years Solved 1988 - 2019 [...]

A machine gun fires bullets of 50 gm at the speed of 1000 m/sec. If an average force of 200 N is exerted on the gun, the maximum number of bullets fired per minutes is: A machine gun fires bullets of 50 gm at the speed of 1000 m/sec. If an average force of 200 [...]

When entire Young’s double slit apparatus is immersed in a liquid the fringe width decreases by 20%. The refractive index of the liquid is When entire Young's double slit apparatus is immersed in a liquid the fringe width decreases by 20^(@). The refractive index of the liquid is August 25, 2020 Category: Uncategorised (JEE Advanced [...]

Two waves of same frequency and intensity superimpose on each other in opposite phases. After the superposition the intensity and frequency of waves will. Two waves of same frequency and intensity superimpose on each other in opposite phases. After the superposition the intensity and frequency of waves will. August 25, 2020 Category: Chapter 16 - [...]

Equations of two progressive waves at a certain point in a medium are given by y1=asin(ωt+ϕ1) and y2= a sin (ωt+ϕ2). If amplitude and time period of resultant wave are same as that of both the waves, then ϕ1−ϕ2 is? Equations of two progressive waves at a certain point in a medium are given by [...]

The equation of progressive wave is given by Y = 4 sin{π (5/t​ − 9/x​) + 6/π​} where x and y are in cm, which of the following statement is correct ? The equation of progressive wave is given by Y=4 sin{π(5/t​−9/x​)+6/π​} where x and y are in cm which of the following statement is [...]

How can you lower a 100-kg body from the roof of a house using a cord with a breaking strength of 80 kgf (kilogram force) without breaking the rope ? How can you lower a 100-kg body from the roof of a house using a cord with a breaking strength of 80 kgf (kilogram force) [...]