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The number of particles crossing a unit area perpendicular to the x-axis in a unit time is given by n = -D (n2-n1), where n1 and n2 are the numbers of particles per unit volume The number of particles crossing a unit area perpendicular to the x-axis in a unit time is given by n [...]

A spherical ball falls through viscous medium with terminal velocity v. If this ball is replaced by another ball of the same mass but half the radius, then the terminal velocity will be (neglect the effect of buoyancy) A spherical ball falls through viscous medium with terminal velocity v. If this ball is replaced by [...]

The relative density of a material of a body is found by weighing it first in air and then in water. If the weight of the body in air is W1 = 8.00 +- 0.05 N and the weight in water is W2 = 6.00 +- 0.05 N, then the relative density and t is [...]

A river 10 m deep is flowing at 5 m/s. The shearing stress between horizontal layers of the river is (η=10^−3 SI units). A river 10 m deep is flowing at 5 m/s. The shearing stress between horizontal layers of the river is (η=10^−3 SI units). September 15, 2020 Category: Cengage JEE Mains Physics by [...]

The length l, breadth b, and thickness t of a block of wood were measured with the help of a measuring scale. The results with permissible errors (in cm ) are and thickness t of a block of wood were measured with the help of a measuring scale. The results with permissible errors (in cm [...]

Between a plate of area 100 cm^2 and another plate of area 100 m^2 there is a 1 mm, thick layer of water, if the coefficient of viscosity of water is 0.01 poise, then the force required to move the smaller plate with a velocity 10 cm/s with reference to large plate is Between a [...]

A U-tube is partially filled with water. Oil which does not mix with water is next poured into one side until water rises by 25 cm on the other side. If the density of oil is 0.8 the oil level will stand higher than the water level by A capillary tube is attached horizontally to [...]

In the relation V = pie Pr^4 / 8 nl, where the letters have their usual meanings, the dimensions of V are In the relation V = pie Pr^4 / 8 nl the dimensions of V are where the letters have their usual meanings September 15, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma [...]

If the velocity of light C, the universal gravitational constant G, and Planck’s constant h are chosen as fundamental units, the dimensions of mass in this system are and Planck's constant (h) are chosen as fundamental units If the velocity of light (c) the dimensions of mass in this system are the universal gravitational constant [...]

A sphere of brass released in a long liquid column attains a terminal speed v0. If the terminal speed is attained by a sphere of marble of the same radius and released in the same liquid is n v0, then the value of n will be (Given: The specific gravities of brass, marble and liquid [...]