Recently Active Physics Questions

I am posting all my doubts one by one from electrostatics..kindly help.. 1) A charge 'Q' is distributed uniformly on a ring of radius 'r'.A sphere of radius 'r' is constructed with its centre at the periphery of the ring. Fin ...

I n the fig. shown a point object O is placed in air . A spherical boundary separates 2 media.AB is principal axis.The refractive index above AB is 1.6 & below AB is 2 The separation b/w the images formed due to refraction at ...

After SHM SHM here is waves tread..i dont have a lot of questions on this topic..but i will psot some good ones for all.... Here are first 5 questions..i will post more if they are solved.. Q1 *Image* Q2 *Image* Q3 How long w ...

Q charge is uniformly distributed over the same surface of a right circular cone of semi-vertical angle θ and height h. The cone is uniformly rotated about a vertical axis passing through its vertex with ω. Calculate the as ...

A current I flows in a long thin walled cylinder of radius R. What pressure do the wall of the cylinder experience?? This went over my head completely. So please give detailed explanation ...

i hav problems with sign conventions in work,power,energy somebody told me to use co-ordinate sign conventions in the whole of mech.. is it a good idea ...

A uniform pressure P is exerted to all the sides of a solid cube at temperature T°C.By what amount should the temperature of the cube be raised in order to bring its volume back to the volume it had before pressure was appli ...

A bird is flying up at an angle sin-1 (3/5) with the horizontal .A fish in a pond looks at the bird . When it is vertically above the fish . The angle at which the bird appears to fly (to the fish) is: (nwater = 4/3) A) sin-1 ...

Ill be posting some of the questions of Aakash AITS which i cudnt manage to do I have been messing up Physics very very badly, at Aakash also as well as in BT Q1. A rod of mass m (hinged at one of its ends at O) has a particl ...

*Image* ...

A gas undergoes a process in which its pressure p and volume V are relates as pVn = constant, where n is a constant and denotes the ratio Cp/CV. The molar heat capacity for the gas in this process will be zero if the value of ...

do you provide the facility of online tests? ...

i am not understanding this concept when a slab is placed in fromt of one of the silts it results in the shifting of the fringes inderstood the ashift is something say x...... it is written in dc pandey that no of fringes shi ...

if tension in sonometer wire is increases by 20%...the frequncy of the same mode of vibration increases by ??? i am gettign 10% but answer is 14% plz point out my fooolish mistake ...

The trajectory of a body with 2 simultaneous,perpendicular oscillations is determined by x=a sin(pωt) y=b sin(qωt+φ) where x and y are projections of body displacement on X and Y axis. For simpicity let us assume pω=qω=Ï ...

Ques1) Rubber has a negative average coefficient of linear expansion. What happens to the size of a piece of rubber as it iswarmed? Ques2) An inflated rubber balloon filled with air is immersed in a flask of liquid nitrogen t ...

The loudest painless sound produces a pressure amplitude of 28 Nm-2.Calculate the intesity of this sound at STP. density air=1.3 kg m-3,speed sound=332 m/s ...

*Image* Find the flux of the charge q through the upper cap of the cylinder....!!!. (the charge q is kept on the bottom surface of the cylinder....) assume the height to be h and the radius to be r ...

Please show that for a perfectly elastic head on collision of a ball of mass 'm' with another ball of mass 'km' , initially at rest , the energy lost by the former is maximum when k = 1. ...

Measurement of two masses is reported as 14.8g and 8.04 g. The difference between them should be..?? ...

Multiple Option correct 1 mole of a monoatomic gas undergoes a thermodynamic proces such that V^3=kT^2 where 'k' is a const.- and the other symbols bear the usual meanings. 1) Work done by the gas is 200R when temp is raised ...

A disc of cork floating on water dips by 5mm when a lump of metal of negligible vol is placed on its top surface. If the same lumpof metal is attached to its bottom surface, the disc will dip A by 5 mm B by greater than 5 mm ...

*Image* given statement: y-component of velocity of M is u1 cosθ1 + u2cosθ2 ans is given as false why?? ...

A rope ladder with a length L carrying a man of mass m at its end is attached to the basket of a balloon with a mass M. The entire system is in equilibrium in the air. Find the work the man should do to climb into the basket. ...

im gonna keep posting some good problems in mechanics from now on. u wudnt find these problems to be really fundu. level or or sumthing, but wud still find it conceptual enuff.some rules u have to follow while doing this will ...

*Image* ...

this q was in one of the tests on the site A ball hits a plank lying on the ground (ball's velocity at the time of hitting the plank is 10i+10j). The coefficient of friction is between the ball and the plank is 0.5. There is ...

two ships are 10 km apart on a line from north to south. the one farther north is moving towards west at 40 km/hr and the other is moving towards north at 40 km/hr. what ios their closest approach and how long do they take to ...

*Image* ...

a disc of mass m=1kg and radius r=1m is hanging from the roof with a light rod of length l=2m as shown in the figure.the disc can rotate freely about hinge point C and the rod can rotate freely about hinge point O . at the gi ...