Recently Active Physics Questions

*Image* all the spheres have equal mass.....and they undergo perfectly elastic collision amongst each other... they hav velocity whose magnitude is written over the arrows and the direction of their initial velocity is repres ...

please somone explain what is 'Cariolis force'???? ...

1.According to moseley, a and b in moseley's law are A)independent of the material B)dependent on the material C)a depends on the material,but b is independent of the material D)none of these 2.Photoelectric effect supports q ...

A disc of diameter 7 cm is placed inside a hemispherical bowl of 25 cm. What should be the refractive index of water such that the disc is completely visible on filling it with water? ...

"A particle is placed on a rough plane inclined at an angle theta, where tan θ = μ = coefficient of friction(both static an dynamic). A string attached to the particle passes through a small hole in the plane. The string is ...

When a ray of light is passed through calcite crystal,it splits up into _____ refracted rays ...

The state of polarization of light with electric field vector \bar{E}=\hat{i}E_0cos(kz-\omega t)-\hat{j}E_0cos(kz-\omega t) is a)linearly polarized along Z axis b)linearly polarized at 45° to X axis c)circularly polarized d) ...

Why do Light waves projected on oil surface show seven colors ? ...

In the arrengement shown here , one end of the spring just touches the surface of mercury contained in a metalic vessel,if the key is pressed on. *Image* (1)the spring stretches,attains equilibriunm (2)the spring compresses,a ...

In winter season we feel dat an iron bar is very cool to touch compared to a fire wood why it happens but we know that the temperature shud be the same. ...

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A disc of mass m ,radius R is shown rolling on horz surface(having sufficient friction). Variation of magnetic and electric fields with direction exist along its path as shown in figure *Image* 1)Find velocity of disc after v ...

Given a cylinder which rolls on horz surface.It encounters a long tub (width=wR)filled with liquid of same density as cylinder.Will the cylinder continue to roll just after it comes out of liquid ?? *Image* ...

The dotted part of the lens is cut & kept along the x-axis as shown. *Image* If parallel paraxial rays fall on this system, the coordinate of the image formed after refraction from both the lenses is (30,-1). If a=2.5 cm, Fin ...

A weightless rod of length l with a small load of mass m at the end is hinged ar point A and occupies a strictly vertical position, touching a body of mass M.A slight jerk sets the system in motion. Frixtion is neglected and ...

may be easy *Image* ...

A disc of mass m ,radius R is shown rolling on horz surface(having sufficient friction). Variation of magnetic fields with direction exist along its path as shown in figure *Image* CHARGE ON DISC=Q 1)Find velocity of disc aft ...

We know that friction between two surfaces is due to the uneven nature of the surface of the bodies. But in case of 2 plane mirrors will there be any friction ????? they have perfectly smooth surfaces. The how can we keep one ...

1 a parallel beam of light falls on a quarter cylinder of radius R as shown in fig. (A) μ= 3 . max. value of OP as shown in fig. (B) ,so that rays do not suffer total internal reflection at the curved surface is *Image* 2.ri ...

*Image* plzzz solve ...

Q1 A square lamina ABCD (side length=a) mass m is kept on an elastic surface.An impulse J is provided very close to vertex A.Find minimum value of impulse J that can flip the lamina. *Image* will it be done this way ?? Assumi ...

The situation is shown at t=0 At some nstant ,simultaneously two events occur a)Cutting os string joining block and ceiling b)Punching of hole at bottom most point of vessel How will velocity of efflux vary with time ??? 1) * ...

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Column-I gives certain situations regarding a point object and its image formed by an optical instrument. Consider direction of incident ray as positive x-direction. The possible optical instruments are concave and convex mir ...

can anyone explain me how to solve problems involving variable mass systems.. except rocket propulsion... please..? ...

A block of mass m is lowered from natural length position of spring slowly by an external agent to equillibrium position .The extension present in the mass less spring was asked from 2 students Student A : 1/2 kx2 = mgx => ...

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Ques 1) A boy of height 1.5 m with the eye level at 1.4 m stands before a plane mirror of length 0.75 m fixed on the wall. The height of the lower edge of the mirror above the floor is 0.8 m. Then :- (a) the boy will see his ...

a ball of mass m is thrown up with a vel. 10 m/s.and it returns to the hand of the thrower with a vel .of 9 m/s. find the height attained by the ball(take level of hand to be 0 and air resistance to be uniform) ...