Recently Active Physics Questions

*Image* Q. A thin spherical shell having uniform density is cut in two parts by a plane and kept separated as shown in fig. The point A is the centre of the plane section of the first part and B is the centre of the plane sec ...

Assertion: A body can have acceleration even if its velocity is Zero at a given instant of time. Reason: A body is momentarily at rest when it reverses its direction of motion. THE CHOICES ARE SAME AS THAT IN THE JEE PAPERS! ...

*Image* find Va-Vb a.3V b.5V c.7V d.9V i m not getting any of the options????? ...

Q. A cube of ice of edge 4cm is placed in an empty cylindrical glass of initial diameter 6 cm. Assume that the ice melts uniformly from each side so that it always retains its cubical shape. Remembering that ice is lighter th ...

*Image* please make me understand why its twice and all 2pa << :-/ ...

3 particles at the vertices of an equilateral triangle follow each other and move witha velocity v. side length = l find the acceleration of each particle at t=T. ...

*Image* two steel rods and an aluminium rod of equal length l0 and equal cross section are joined rigidly at their ends a sshown in the figure below. all the rods are in a state of zero tension at 00C. Find the length of the ...

we have a uniformly charged hollow solid hemisphere . A is the centre of the circle which is formed by the edge of the hemisphere. (the radius of the circle is therefore R --- R being radius of the hemisphere) B is a point at ...

*Image* in the given circuit each cell has a internal resistance of 1 ohms. find out the potential difference across the 2 V cell ...

a glass window is to be fit in an aluminium frame . the temperature on the working day is 400C and the glass window measures exactly 20 cm X 30 cm . What should be the size of the aluminium frame so that there is no stress on ...

*Image* find the aswers.. reat the questions as 1,2,3 respectively.. ...

assume a big solid sphere wich encompasses the orbitl of the moon round da earth and the moon moves oer a sphere .is da moon slidin or rolling?given dat the time takn for the moon to orbit the earth is 30 days and the tim ...

Sam as pratek i also seeks notes on Elctricity-basics only I hav jus given a thought to it ...

though projctile is believd to be easiest topic by such stage of time Sir Can I get some idas on deling with projctile sums ...

When we calculate the min velocity at the bottom a body can have while moving in vertical circle attached to a string of length r we calculate the min value of vel for which T=0 and get v= 5gr but when we calculate the same f ...

A meter scale made of stell is calibrated at 20°C to give correct reading. Find the distance between 50 cm mark and 51 cm mark if the scale us used at 10°C. Coefficient of linear expansion of stell is 1.1 X 10 -5 /°C. Ans. ...

a railway track (made of iron) is laid in winter when the average temperature is 180C . The track consists of sections of 12.0m placed one after the other . how much gep should be left between two such sections so that there ...

there are 4 concentric shells A,B,C,D, OFradii a,2a,3a,4a resp. shells B & D are given charges +q & -q resp. shell C is now earthed .the potential diff. VA-VC ...

*Image* try out q17 ............................................... ................................................. ............................................... ans is (A) ...

*Image* MOI os square.. smaller sq has mass m length L Ib=16Is as length is twice and mass is four times.. and Is=KmL2 Ib=K(4m)(2L)2=16Is ..(i) by parallel axis theorem Ib=4Is+4m(l/ 2 )2 Ib=4Is+2mL2 ..(ii) From (i) and (ii) I ...

A block of mass 1kg and density 0.8g/cm3 is held stationary with the help of a string as shown in the figure. the tank is accelerating upwards with an acceleration a=1.0m/s2 find: the tension in the string if the string is no ...

charges Q1 &Q2 lies inside & outside respectively of a closed surface S.Let E be the field at any point on S &φ be flux of E over S a)if Q1 changes ,bothE& φ will change b)if Q2 changes ,E will change but φ will not change ...

f f for a spherical shell a)if potential inside it is zero then it necessarily electrically neutral b)electric field in a charged conducting spherical shell can be zero only when the charge is uniformly disturbed c)electric p ...

an electic field converges at the origin whose magnitude is given by the expression E=100r Nt/Coul,where r is dist.measured from origin. a)total charge contained in any spherical vol. with its centre at origin is -ve b)total ...

charges Q1 &Q2 lies inside & outside respectively of a closed surface S.Let E be the field at any point on S &φ be flux of E over S a)if Q1 changes ,bothE& φ will change b)if Q2 changes ,E will change but φ will not change ...

Suppose you find a motionless rope reaching vertically up in the sky (without anybody holding the other end) and hanging down nearly to the ground. What would be the length of the rope? ...

consider 5 identical rt angled isosceles prism of ref ind μ1,μ2,........μ5 resp theyr arranged touching each other ( imagine 3 of em placed in str line and 2 of em placed btw the gaps by inverting them ) they r in order 1, ...

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let I be the moment of ineria of a uniform square plate about an axis AB that pases thrpugh the centre & parallel to two of its sides. CD is a line in the plane that passes thru the center of the plate & makes an angle θ wit ...

*Image* two thin circular discs of mass 2kg and radius 10cm each are joined by a rigid massless rod of length 20cm. the axis of the rod is along the perpendicular to the plane of the disc through their centres. this object is ...