Arihant Physics by D.C Pandey

Assertion : If gravitational potential at some point is zero, then gravitational field strength at that point will also be zero. Reason : Except at infinity gravitational potential due to a system of point masses at some finite distance can’t be zero. Assertion : If gravitational potential at some point is zero then gravitational field [...]

An air bubble of radius 1mm is formed inside water at a depth 10m below free surface (where air pressure is 10^5Nm^2). The pressure inside the bubble is – (Surface tension of water = 2×10^–7N/m) An air bubble of radius 1mm is formed inside water at a depth 10m below free surface (where air pressure [...]

A metal sphere connected by a string is dipped in a liquid of density ρ as shown in figure. The pressure at the bottom of the vessel will be, (p0=atmospheric pressure ) (p0=atmospheric pressure ) A metal sphere connected by a string is dipped in a liquid of density ρ as shown in figure. The [...]

The pressure of the gas in a cylindrical chamber is P0. The vertical force exerted by the gas on its hemispherical end is The pressure of the gas in a cylindrical chamber is P0. The vertical force exerted by the gas on its hemispherical end is September 18, 2020 Category: Arihant Physics by D.C Pandey [...]

An iron block is on a boat which floats in a pond. The block is thrown into the water. The level of water in the pond will be An iron block is on a boat which floats in a pond. The block is thrown into the water. The level of water in the pond will [...]

A solid shell loses half its weight in water. Relative density of shell is 5. What fraction of its volume is hollow? A solid shell loses half its weight in water. Relative density of shell is 5. What fraction of its volume is hollow? September 18, 2020 Category: Arihant Physics by D.C Pandey , Chapter [...]

Two substances of relative densities ρ1 and ρ2 are mixed in equal volume and the relative density of mixture is 4. When they are mixed in equal masses, the relative density of the mixture is 3. The values of ρ1 and ρ2 are : the relative density of the mixture is 3. The values of [...]

A small ball of relative density 0.8 falls into water from a height of 2m. The depth to which, the ball will sink, is (neglect viscous forces) A small ball of relative density 0.8 falls into water from a height of 2m. The depth to which is (neglect viscous forces) the ball will sink September [...]

The density of ice is x g/c^3 and that of water is y g/c^3 when m gram of ice melts, then the change in volume is The density of ice is x g/c^3 and that of water is y g/c^3 when m gram of ice melts then the change in volume is September 18, 2020 [...]

A tank full of water has a small hole at its bottom. Let t1 be the time taken to empty the first half of the tank and t2 be the time needed to empty the rest half of the tank, then A tank full of water has a small hole at its bottom. Let t1 [...]