Recently Active Physics Questions

You are at one end of long airport runway. A vertical temperature gradient in the air results in the refractive index variation with height as n = n1( 1+ ay) where n1 is the refractive index at the runway a = 1.5 * 10^(-6) pe ...

THE MAXIMUM VALUE OF INDEX OF REFRACTION OF A MATERIAL OF A PRISM WHICH ALLOWS THE PASSAGE OF LIGHT THROUGH IT WHEN THE REFRACTING ANGLE OF THE PRISM IS 'A' IS a)(1-sinA/2)^1/2 b)(1-cotA/2)^1/2 c)(1-(tanA/2)^2)^1/2 d)(1+(cotA ...

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If a capillary tube is dipped in a liquid of density \rho with surface tension \alpha , what is the amount of heat evolved? Take the contact angle to be \theta . ...

*Image* the midle plate is earthed ,find the charges on both sidesof each plate ...

i have solved it ............it is for u all very good question in the given circuit all capacitors are initially uncharged.After closing S1 for long time,suddenly S2 is also closed and kept closed for long time.Total heat pr ...

*Image* MY ans is not matching....... [2] its simpl bernoli but pata nahi kyun/......... ans givn is A ...

Q73 A ball is kept at a height of h above the surface of a heavy transparent sphere made of a material of refractive index μ. The radius of the sphere is R. At t=0, the ball is dropped to fall normally on the sphere. Find th ...

A vernier calliper having 1 main scale div. .1cm is designed to have a least count of .02cm. If n be the no. of divisions on vernier scale and m be the length of vernier scale. Find n&m ...

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A vernier calliper having 1 main scale div. .1cm is designed to have a least count of .02cm. If n be the no. of divisions on vernier scale and m be the length of vernier scale. Find n&m ...

Calculate the coefficient of refraction of a sound wave on the boundary between air and glass. Young’s modulus for a glass is 6.9 * 1010 Nm-2 , density of glass is 2.6gcm-3 and air temperature is 20°C . velocity of sound i ...

A Li7 target is bombarded with a proton beam current of 10-4A for 1 hour to produce Be7 with an activity of 1.8 *108 disintegrations per second . assuming that one Be radioactive nucleus is produced by 1000 protons bobarding ...

n main scale divisions corespond to n-2 vernier scale divisions 1 main scale division is 1 mm. if the least count of the vernier is .001 m find n ...

find the ratio of magnitude of angular momentum of a rolling disk abt origin to that abt tne point O on the disk which is at a dist. R/2 frm the center.. 1.2:1 2.1:1 3.1:3 4.4:3 ...

a uniform rod AB of mass m n length l is at rest on a smooth horizontal surface. an impulse J is applied to the end B perpendicular to the rod in horizontal direction . speed of partical at a dist. l/6 frm the centre towards ...

a tube of given shape has total length 2l and an area S .its bottom and upper parts are filled with 2 non compressible non viscous liquids of densities ρ and 3ρ.if its motion is simple harmonic find the angular frequency ...

Q1. A small spherical ball of mass m and radius r rolls in a concave surface of radius R with sufficient friction. Find the time period of the resulting SHM. Q2. A body of mass m and specific gravity d(>1) floats in water. ...

hoW TO DO THIS UN BY ENERGY METHD ??? maine thoda kiya par aage [7] *Image* ...

*Image* solve this comprehension ...

Can anybody explain me HCV ques. no. 34 from the chapter sound waves?? ...

statement1: an astronaut in an orbiting station above the earth experiences weightlessness statement 2: an object moving around the earth under the influence of earth's gravitational force is in a state of 'free fall' ...

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*Image* determine d period of oscilations of mercury of mass m=200g poured into d bent tube whose right arm forms an angle of @=30 degree wid d vertical . d cross sectional area of d tube is S=.5cm^2 d viscosity i ...

When effort is applied parallel to the base of an inclined plane (angle of inclination θ) its mechanical advantage is equal to (a) tan θ (b) 1/ tan θ (c) sin θ (d) 1/ sin θ ...

for an ideal gas eqn of a process for which the heat capacity of the gas varies with temperature as C= α/T.....α is a constant...... ...

a rregular poly gon of n sides is formed by bending a wire of total length 2Î R which carries a current i . find the magnetic field at the centre of the polygon. ...

two spherical rain drops of equal size are falling vertically through air with a terminal velocity of 1 m/s. what would be the terminal speed if these two drops were to coalesce to form a large spherical drop ? ...

suppose, the electric force between two charged particles were independent of distance.in this case would a neutral insulator still be attracted towards comb?????????????? who ever replies solid reasons are a must. ...

Conisider a liquid of density ρ filled upto the brim to of the tanker of given shape.What is the velocity of a small hole located at a distance of x from the bottom..... *Image* ...