Recently Active Physics Questions

1)The torque of the weight of any body about any vertical axis is 0. Is it always true? 2)A sphere rolls on a horizontal surface. Is there any point of the sphere which has a vertical velocity? 3) When several forces acts on ...

*Image* second one please explain clearly.. first one please confirm answer.. ...

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a really nice ques for practice .......... not a doubt the equivalent capacitance may be equal to 1)0.3μF 2)0.5μF 3)0.9μF 4)2μF 5)3.2μF 6)1μF *Image* cheers!!!!![1][1][1][1] ...

ques-- A nonconducting plate of radius r and mass m which has q charge distributed all over it .The plate is rotated about its axis with an angular speed ω.What is the relation of magnetic moment μ and angular momentum l of ...

A particle starting frm rest moves in a st. line with acc. as shown in the a - t graph . Find the distance in m travelled by the particle in the first four seconds frm start of its motion. *Image* ...

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a uniform rod of mass 'm' and length '5a' is free to rotate and hinged at point 'P' point P is at a distance of 'a' from one end.a ball of mass '2m' strikes the rod with velocity 'v' at point 'q'.q is at a distance of '2a' fr ...

a bomb bursts at t=0 and the small pieces fly off in every direction.... a man is standing at a distance of 30 m frm the place where this bomb blast occurs if the velocity of all the pieces vary upto 30 m/s (max vel. is 30 m/ ...

Consider three charges q,q and -q is placed at the vertices of an equilateral triangle, as shown in fig what is the force on each charge? \left|F_{1} \right|=\left|F_{2} \right|=F and \left|F_{3} \right|=\sqrt{3}F *Image* ...

Q- According to bohr's atomic theory for an electron in its nth orbit: mvr = nh/2Î suppose the velocity of an electron(m= 9.109*10-31) revolving in an orbit of radius 'r' is found to be v=1.4504*106 ,then: (i)find no of signi ...

An electron falls through a distance of 1.5 cm in a uniform electric field of magnitude 2.0\times 10^{4}NC^{-1} . The direction of the field is reversed keeping its magnitude unchanged and a proton falls through the same dist ...

Q the resonance length obtained in an exeriment with resonance column tube was 27cm with a fork of freq. 300Hz. If the velocity of sound is 330m/s at the temp of laboratory, the second resonance length and end correction are_ ...

Which weighs more: a kilogram of feathers or a kilogram of iron? ' Hint: "They dont weigh the same" :D ...

how much time does a projectile take to reach half of its greatest height?? ...

a particle is performing simple harmonic motion along x axis with amplitude 4 cm and time period 1.2 s. The min. time taken by particle to move from x=+2 cm to x=+4 cm and back again is_________ ...

we know that friction can not propose motion, its just opposes it... is the same true for frictional impulse as well?? say if a body is moving in +ve x - axis nd a frictional impulse acts on the body towards left, then under ...

PLEASE FOLLOW THE LINK TO SEE THE PROBLEM.HERE IN THE LINK THE LINK GIVEN FOR THE ACTUAL IMAGE DOES NOT WORK.PLEASE GIVE ME THE SOLUTION OF THE PROBLEM AND THE NEW ACTUAL LINK OF THE IMAGE GIVEN IN THE QUESTION.PLEASE SOMEBOD ...

A particle is projected with velocity u at an angle q with the horizontal . Find the radius of curvature of the parabola traced out by the particle at the point where velocity makes an angle q/2 with the horizontal. plzz give ...

a force P act on body of mass 'm' intially at rest and intiates its vertical motion at t=0 .the force decreases at uniform rate and is proportional to the vertical displacement of body.Find the velocity of the body at a heigh ...

we know electric field is a conservative field and so, ∫cloosed loopE.dl=0 but suppose a conducting loop is placed in a changing magnetic field, emf is induced and electrons go round a loop and the work done in taking the e ...

Consider a thin cylinder’s shell with radius r and mass m (inertia mr^2). Two sides of the surface have different characteristics. Outer surface of the shell is a conductor with resistivity ρ and thickness δ(δ<<r). ...

in NCERT physics (class XI) a formula is given for calculation of error in equivalent resistance of two resistances when they are connected in parallel for eg if two resistances are A and B such that: RA = R1 + ΔR1 RB = R2 + ...

Q1 2 particles execute SHM of same amplitude and frequncy on parallel lines. They pass one another when moving in opposite directions each time their displacement is half the amplitude. What is the phase diffrence between the ...

*Image* TWO BLOCKS ARE CONNECTED BY A SPRING.THE BLOCKS R PLACED ON A ROUGH HORIZONTAL SURFACE.BOTH R OF EQUAL MASS, WITH CO-EFFICIENT OF FRICTION AS mu BETWEEN BLOCK AND SURFACE. MINIMUM HORIZONTAL FORCE ON ONE MASS SO AS TO ...

A particle is thrown over a triangle from one end of a horizontal base and grazing the vertex , it falls on other end of base . If a nd b r base angles and q the angle of projection , prove tan q = tan a + tan b ........ ...

this is very easy may be!! Well, we know that permeability of a medium is given by.... μmedia=μr.μo where μr is the relative permeability.. μo is the permeability of free space... so now question is: For a given media is ...

after quite sometime now!!! well in this question i will give a question and 2 solutions to it...the people will have to tell which one is correct and why the other one is wrong!!!! so here goes the question(IRODOV):: A point ...

last one for today! suppose we are charging a capacitor of capacitance C across a potential difference(battery) of V. Energy stored in capacitor = 1/2 CV2 work done by battery=q.V but q=CV so work done = CV2. where did the re ...

hey this is another one from electrostats!! suppose we are to find the electrostatic fiield at a point on the axis of a uniformly charged ring! i am not going to type the whole derivation now i hope all of u know it :D . i am ...