A parallel plate capacitor is made of two circular plates separated by a distance of 5 mm and with a dielectric of dielectric constant 2.2 between them. When the electric field in the dielectric is 10000 V/m, the charge density of the positive plate will be close to

Jitendra Mishra Physics 17 Jun, 2019 1 Answer 69 views







The mi of a rod abt an axis through its axis and perpendicular to it is 1/12ml^2 the rod bent in middle so that 2 halves make angle 60 mi of bent rod abt same axis is

Anonymous User Physics 05 Jun, 2019 0 Answer 66 views


a square is made by joining 4 rods each of mass m and length its mi abt an axis pq in its plane and is passing through 1 of its end

Anonymous User Physics 05 Jun, 2019 1 Answer 69 views











The equilibrium constant of the reaction CH3COOH (l)+C2H5OH (l)=CH3COOC2H5+H2O is 4.if one mole of each of acetic acid and ethyl alcohol are heated in presence of little concentrated H2SO4 at equilibrium the amount of ester present is

Anonymous User Chemistry 28 May, 2019 1 Answer 748 views




 an elemental crystal has a density of 8570kgm3 the packing efficiency is 0.68 if closest distance b/w neighbouring atom is 2.86 angstrom the mass of 1 atom

Anonymous User Chemistry 22 May, 2019 1 Answer 89 views

A bird is sitting on the top of a vertical pole 20 m high and its elevation from a point O on the ground is 45°. It flies off horizontally straight away from the point O. After one second, the elevation of the bird from O is reduced to 30°. Then the speed (in m/s) of the bird is?

Preeti Rai Maths 20 May, 2019 1 Answer 114 views

There is a circular tube in a vertical plane. Two liquids which do not mix and of densities d1 and d2 are filled in the tube. Each liquid subtends 90° angle at centre. Radius joining their interface makes an angle α with vertical. Ratio of d1/d2

Anonymous User Physics 20 May, 2019 1 Answer 206 views



From a tower of height H, a particle is thrown vertically upwards with a speed U. The time taken by the particle, to hit the ground, is n times that taken by it to reach the highest point of its path. The relation between H, u and n is ?

Anonymous User Physics 18 May, 2019 1 Answer 233 views







The radiation corresponding to 3 → 2 transition of hydrogen atom falls on a metal surface to produce photoelectrons. These electrons are made to enter a magnetic field of 3 × 10−4 T. If the radius of the largest circular path followed by these electrons is 10.0 mm, the work function of the metal is close to ?

Anonymous User Physics 12 May, 2019 1 Answer 98 views

A bird is sitting on the top of a vertical pole 20 m high and its elevation from a point O on the ground is 45°. It flies off horizontally straight away from the point O. After one second, the elevation of the bird from O is reduced to 30°. Then the speed (in m/s) of the bird is?

Anonymous User Physics 11 May, 2019 1 Answer 96 views


The coercivity of a small magnet where the ferromagnet gets demagnetized is 3 × 10^3 A m−1 . The current required to be passed in a solenoid of length 10 cm and number of turns 100, so that the magnet gets de magnetised when inside the solenoid, is?

Anonymous User Physics 09 May, 2019 1 Answer 159 views



A parallel plate capacitor is made of two circular plates separated by a distance of 5 mm and with a dielectric of dielectric constant 2.2 between them. When the electric field in the dielectric is 3 × 10^4 V/m, the charge density of the positive plate will be close to ?

Anonymous User Physics 09 May, 2019 0 Answer 77 views

a body is thrown vertically upward from a point 125 m above ground it goes up to a max height of 250m above ground and passes through a on its downward journey the velocity of body when it is at a height of 70m above ground

Anonymous User Physics 08 May, 2019 1 Answer 711 views



An organic compound is found to contain C, H and O as elements. It is soluble in water. chars with conc. sulphuric acid and also gives purple colour and Molisch reagent. The solution test is negative but it forms a blue colour with iodine. The organic compound should be?

Anonymous User Chemistry 06 May, 2019 1 Answer 126 views