Recently Active Physics Questions

Can anyone tell me how we write q-value in case of β- and β+ decay? I have some confusion in what is written in hcverma. ...

Q) the uniform rectangular (laminar) block in the figure has mass M and dimensions [a,a/2] which is supported by two massless inelastic strings of equal length whose other ends are attached to a rigid ceiling Find the angular ...

I dont know how many times this one has been discussed here.....but the reason for posting here is that I just found 2 good solns to this one..... Find resistance b/w A and B *Image* Lets see who posts all 3.... Start with th ...

*Image* The flexible bicycle type chain of length πr/2 and mass per unit length ρ is released from rest with θ=0° in the smooth circular channel and falls through the hole in the supporting surface. Determine the velocity ...

At the 2 ends of a massless string of length 'l' 2 particles of masses 'm' each are attatched.The system is kept on a frictionless surface. Now the sring is pulled by a horizontal force'f' at the middle such that the particle ...

*Image* A sphere of mass m held at a height 2R b/w a wedge of same mass m and a rigid wall, is released from rest. Assuming that all the surfaces are frictionless. Find the speed of both the bodies when the sphere hits the gr ...

This is Season2 of "Some good revision problems" which was completed succesfully here last year http://targetiit.com/iit-jee-forum/posts/some-good-revision-problems-2579.html All the rules are same as mentioned there..... We ...

Find the resistance between any two of the adjacent sides of the cube. ρ is the specific resistance. Cube length = L ...

Now that's very interesting -- a section for physics Olympiad. It opens another world to us. At least, there would be a bit less restriction as to the nature of problems that ppl can discuss over here. Good work Nishant sir. ...

The axle of a wheel lies on the surface of an oil bath, and four equal charges q are spaced equally around the perimeter. The fixed charge Q repels all four charges q. What do you predict will happen to the wheel? *Image* ...

A particle of mass m rests on a horizontal floor with which it has a coefficient of static friction μ. It is desired to make the body move by applying the minimum possible force F. Find the magnitude of F and direction in wh ...

Q) The rod of length L tied to two strings is lifted up a little distance and let go. The situation just before the strings become taut is shown below. the velocity of the rod is V at this instant. Find Vcmand ω just after t ...

Find the moment of inertia of the following w.r.t the axis passing through their centre of mass: 1.An elipzoid(3-d of an ellipse). 2.A regular hexagon of side 'a'. ...

three identicle pulleys each of mass M and radius R are arranged on a smooth horizontal tabe as shown in fig.....A force F is applied to pulley S while P and Q can rotate due to thread wound on them...... Q1.When centre of pu ...

4)A grasshopper can jump max dist of 1.6m. It spends negligible time on ground. How far can it go in 10(2)^1/2 s? 5) 2 particles A and B are projected simultaneously from the 2 towers of ht. 10m and 20m respectively.A is proj ...

A nice problem.. Simple loop eqns... try it *Image* ...

a ball rolls widout sliping on a hemisphere wid small oscillation...radius of hemisphere R....of ball r....find T ...

Prove that a point charge CANNOT be in the state of stable equilibrium in an electrostatic field!! ...

3) A particle is projected with velocity 2(gh)^1/2 so that it just clears two walls of equal ht. h at a dist. Of 2h from each other. Find time of passing of particle between two walls. ...

A sphere is rolling on the rough surface without any slipping at the contact point. Find the radius of curvature of the trajectory of the point which is at R/2 just above the center... i don't know why i messed this [2] ...

Does any body know the "Extra Force Method" to solve the spring pulley system. And also I want to know if there is any other method to solve pulley problems(system containing a no of pulleys). if yes then plz tell me..... ...

the uniform bar of mass M and length l has a small roller of mass m with negligible bearing friction at each end.............determine the time period of the system for small oscillation on the curved track.... *Image* ...

*Image* what is the minimum value of ω for which water seperates. ...

*Image* Let fricn. between the surfaces of m1 and M be f1, m2 and the floor be f2 and between M and the floor be 0. Let M be pulled towards right by a force F and it move with an acceleration a. Please see if my equations are ...

*Image* the right block is fixed. the left block has velocity v=√2m/s at any instant AB=R√2 right block has friction. all other surfaces are frictionless what is the velocity of center of mass of cylinder at this instant ...

A rod slips with one end on x-axis and the other on the y-axis. If the the velocity of the end on the x-axis is V when ange is theta.Find the angular velocity of the rod? ...

*Image* A conducting ring of radius L=2m is placed on x-y plane, having its centre at the origin. A uniform magnetic field 5T(-k) exists in the space. A conducting rod PQ of mass M & length 2L is placed along the diameter of ...

a capacitor C is charged through a resistance R by a batt of emf E by closin switch at t=0.find amt of heat energy dissipaed in d resistor R durin d 1st tym constant?? ...

An infinite thread of charge density λ lies along Z axis.Find the potential difference between the points (4,3,4) and (3,4,0) ...

find the time period of small oscillation of mass m abt its mean pos....assume ideal conditons *Image* ...