Recently Active Physics Questions

Q1)Two positive charges +Q are held fixed a distance d apart.A particle of -ve charge -q and mass m is placed mid way between them nd thn given a small displacement perpendicular to the line joining thm nd released.The partic ...

Guys a big Conceptual Doubt. Have A look. Surface energy is the work done per unit area in the surface against force of surface of tension at constant temp. and surface energy is numerically taken equal to surface tension. Bu ...

Moment of Inertia of: Ring = mr2 = Hollow Cylinder Disc = mr2/2 =Solid Cylinder Just elongate the ring in the direction of the axis of rotation and you'll get a hollow cylinder. Just elongate the disc in the direction of the ...

a long horizontal rod has a bead which can slide along its length and initially placed at a distance L from one end A of the rod The rod is set in angular acceleration a' If the coefficient of friction between the rod and the ...

An organ pipe is in resonance at its fundamental mode with a tuning fork which in turn produces k beats per second with another tuning fork of n Hz.When the organ pipe is dipped in water to one-third of its original length,it ...

A block of mass 4m and a conducting square loop of mass m are connected by light insulating string passing over smooth pulley.The plane of loop is perpendicular to the magnetic field,as the system si relaesed. *Image* a)the b ...

A uniform charge density σ is given to a non conducting uniform disc of radius r,what is the potential of a point at the circumference ...

*Image* passage: a rod of mass m n length l is placed vertiaclly on a smooth floor as shown in the fig.. The lower end of the rod is given a negligible slight push towrds left due to which the lower end of the rod moves towar ...

Q. Consider an excited hydrogen atom in state n moving with a velocity v(v<<c). It emits a photon in the direction of its motion and changes its state to a lower state m. Apply momentum and energy conservation principle ...

please explain this statement and also indicate briefly its proof if you can A body floats in a liquid in a vessel which accelerates vertically with an acceleration less than g. the fraction immersed will neither depend on th ...

A non conducting rod of length l and charge q is rotated along an axis passing through the center of mass with ang velocity ω,What is the mag moment of the rod? (Ans:qωl2/24) can anyone post the solution,i'm not getting the ...

The disc of the radius R is confined to roll without slipping at A and B. *Image* If the plates have the velocities shown,determine the angular velocity of the dics ...

A ladder of length 5m inclined to a vertical wall is slipping over a horizontal surface with velocity of 2m/s when A is at distance 3m from ground.What is the velocity of COM at this moment? *Image* ...

Q1 What is angular velocity of line AB at the instant shown? Q2 What is angular velocity of B wrt A at the given instant? Q3Prove that [vB/A]≠[vA/B] (where [ ] denotes magnitude part) *Image* ...

The leaning tower pisa is 55mhigh and 7.0m in diameter.The top of the tower is displaced 4.5 m from the vertical.Treating the tower as a uniform,circular cylinder a)wat additional displacement,measured at the top,will bring t ...

*Image* * light rods *light string(ideal) ...

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Q. A vector has a magnitude of 5 units and it is at an angle of 30° to the radius. The representation of the vector in polar coordinates is________________ Ans given is 5cos 30°UQ - 5 sin Ur i dint get the answer. mine was ...

f(x) is a differentiable function satisfying the following relation : *Image* ...

A ball of mass M1=1kg falling vertically with a velocity v0=2m/s;strikes a wedge of mass M=2kg kept on a smooth,horizontal surface as shown in figure.The coefficient of restitution between the ball and the wedgel is e=1/2; Fi ...

a ray of light is incident at an angle a on the boundary separating two transparent media It is transmitted If the angle of incidence is very slightly increased the ray gets reflected in the same medium The difference between ...

A uniform solid cylinder of radius R=15 cm rolls over a horizontal plane passing into an inclined plane forming an angle α=30° with the horizontal. Find the maximum value of the velocity vo which still permits the c ...

Consider a gravity free hall in which an experimenter of mass 50 kg is resting on a 5 kg pillow,8ft above the floor of the hall.He pushes the pillow down so that it starts falling at a speed 8 feet/sec. The pillow makes a per ...

AN EQUILATERAL TRIANGLE abc formed from auniform wire has two small identical beads initially located at A. THE TRIANGLE IS SET ROTATING about the vertical axis AO. then the beads are realsed from rest simultaneously and allo ...

A THIN COAT OF TRANSPARENT SUBSTANCE WITH A REFRACTION INDEX `n` LOWER THAB THAT OF THE GLASS IS APPLIED TO THE SURFACE OF OPTICAL GLASS[COATED GLASS] TO REDUCE ITS REFLECTION FACTOR[REFLECTANCE].ESTIMATE THE THICKNESS OF THE ...

*Image* FIND THE DIFFERENCE IN WATER LEVELS IN THE CENTER OF THE TUBE AND THE CORNERS. TUBE IS ROTATED BY ANGULAR VELOCITY ω AND THE LIQUID HAS DENSITY OF ρ. [1] Each of you must have done this sum atleast a 1000 times, but ...

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A PLANE -CONVEX LENS WITH A RADIUS OF CURVATURE R2<R1 IS PLACED WITH ITS CONVEX SIDE ON TO THE SURFACE OF A PLANE CONCAVE LENS HAVING A RADIUS OF CURVATURE R1. FIND THE RADII OF NEWTON`S RINGS THAT APPEAR AROUND THE POINT ...

Two capillary tubes of AB and BC are joined end to end at B. AB is 16cm long and of diameter 4mm. BC is 4cm and of diameter 2mm. The composite tube is held horizontally as in poiseuilli's experiment, with A connect to a v ...

find sum to n terms of the series 0, 24, 120, 360, 840, 1680 .......... find sum in term of n only ...