Recently Active Physics Questions

a body whose dimensions may be neglected is placed inside a thin homogenious sphere.prove that the force of attraction acting from the sphere on the body is zeroirrespesctive of its position inside the sphere! ...

*Image* A wall is moving with velocity u & a source of sound is moving with velocity u/2 in the same direction as shown in the figure. Assume sound travels with velocity 10u. The ratio of incident sound of wavelenth on the wa ...

A POINT SOURCE IS EMITTING SOUND IN ALL DIRECTIONS.FIND THE RATIO OF DISTANCE OF TWO POINTS FROM THE POINT SOURCE WHERE THE DIFFRERENCE IN SOUND LEVELS IS 3 db A)2 B)3 C)0.5 D)√0.5 ...

block A of mass 1kg resting on a horizontal surface is attached to block B of mass 0.5kg by means of a massless and inextensible string going over a frictionless fixed pulley .the string connected to A is loose .When B falls ...

TWO STONES ARE PROJECTED FROM A POINT P IN THE SAME DIRECTION WITH A VELOCITY OF 20m/s ONE AT ANGLE α ABOVE THE HORIZONTAL AND THE OTHER AT AN ANGLE α TO THE VERTICAL.FIND THE DISTANCE OF EACH STONE FROM P 1 SECOND AFTER PR ...

*Image* system shown in figure is in equilibrium. find the magnitude of net change in the string tension between two masses just after, one of the springs is cut. masses of both the blocks is same and equal to M. and spring c ...

*Image* find the minimum value of μ between the two blocks for no slipping ...

calculate the radii of frensel zones of a plane wave for a point b removed from the wave front by a distance of b>>λ, where λ is the wavelength of the source. ...

*Image* find the time period of oscillation of M ...

BT vs FIITJEE (keeping following in mind) 1.in terms of no of students taking 2.whose percentile is almost equivalent to iit jee(imp) 3.whose que r closely related to iit pleaseeeeeeeeeee give ur votes am in need of it ...

doubt we say that low pressure cause cyclone (high movement of air)or large velocityair. sound velocity is affected by air but not by pressure . then in condition of cyclone does velocity of air is affected or not explain ...

An L shaped bar of mass m is pivoted about one end so that it can rotate freely in vertical plane. Calculate θ0 at equilibrium If it is slightly displaced,find frequency of oscillation *Image* ...

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A uniform rod is placed on 2 spinning wheels .The axes of wheel are separated by 2l . The coeff of friction b/w rod and wheel is μ.Find peiod of small oscillations of rod. *Image* ...

A straight glass tube has sealed lower end and upper end open to atmosphere.The lower half is filled with n moles of diatomic gas .The length of the tube is 1.52 m How much heat should be provided to the gas such that all the ...

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*Image* in the figure shown , the minimum value of 'a' such that cylinder starts rising up the inclined plane : (a) g tanθ (b) g cosθ (c) g sinθ (d) g cotθ ...

A massless conical flask filled with liquid is kept on a table in vacuum. Force exerted by liquid on base of flask = W1 Force exerted by flask on table = W2 then (A)W1=W2 (B)W1>W2 (C)W2>W1 ...

plz explain the concept of capillary rise ...

Q.1 *Image* answer given is (c) but i got (d) [2][7] ...

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a piece of wax weighs 18.03 gm in air A piece of metal is found to weigh 17.03 gm in water It is tied to the wax and both together weigh 15.23 gm in water Then the specific gravity of wax is My problem is that if the metal's ...

In an alpha decay, energy released is 50Mev. It’s also known that KE wid which alfa particle is ejected is 48Mev. Wat is mass no parent nucleus?? ...

If a satellite is moving in a circular orbit with an angular speed equal to that of the earth and it is directly above the north pole Find the time taken to come over the equatorial plane I have got the radius of the orbit an ...

*Image* Options are: (a) 9k/m (b) 8k/m (c) k/m (d) k/2m ...

If we find the magnetic field at a point due to a straight finite wire carrying current by Ampere's law, we get the same expression as for an infinite wire which is μ0I/2πr which is absurd bcoz for a finite wire it is given ...

A man pushes a compartment of a train in the direction in which the train is accelerating uniformly. Will the man do +ve ,-ve or no work ? ...

two vessels have the same base area but different shapes. The first vessel takes twice the volume of water than the second vessel required to fill up to a particular common height. In which vessel the force exerted by water o ...

*Image* magnitude of induced E at P is proportional to ?? 1)1/r 2) r 3)1/r^2 4)zero. ...

In a uniform sphere of charge density P (rho), a small cavity is created. The center of the cavity is at a distance a from the center of the sphere. Taking center of the sphere as origin and vector a as unit vector along the ...