A ball of radius r and density ρ dropped through a viscous liquid of density σ and viscosity η attains […]
The velocity of sound in air is doubled when the temperature is raised from 0°C to α°C Q. The velocity
The average energy released per fission for the nucleus of 235U is 190 MeV when all the atoms of 47
The size of the images of an object formed by a thin lens are equal when the object is placed
A prism of angle 75° and refractive index √3 is coated with thin film of refractive index 1.5 only at
When an unpolarized light falls at a particular angle on a glass plate, the reflected beam is linearly polarized. The
An air bubble of volume 2.9 cm³ rises from the bottom of a swimming pool of 5 m deep. Find
A small metallic sphere of diameter 2 mm and density 10.5 g/cm³ is dropped in glycerine having viscosity 10 Poise
The current passing through a conducting loop in the form of equilateral triangle of side 4√3 cm is 2 A.
Two charges 7 μC and −2 μC are placed at given points in an external electric field. Find the electrostatic