Recently Active Physics Questions

A uniform bar is pivoted about one end. Initially it is held vertical and allowed to fall. When its angular displacement is 180°, its acceleration is a) g b) 2g c) 3g d) 4g sry i can't confirm the answer ...

can anyone pls derive me the formula of B..MAGNETIC FIELD..OR MAGNETIC INDUCTION in tanA position...i knew the formula...i need its derivation...pls can anyone help in this??? ...

1.A coil of inductance 1H and 10 ohm resistance are connected to a battery of emf 50 V ,The circuit is switched on at t=0.Let dU/dt be the rate at which energy is stored in the inducter,and P0is the power output of battery at ...

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A particle is performing SHM with time period T, about O. It passes through a point P, such that op=x, with a velocity v in direction of P. What is the time elapsed before it returns back at P? ...

two rods of equal length lie with one on x-axis and other along y=x.they intersect at origin.first one moves with velocity v along +y axis and second with velocity=(v/√2)( i-j).find velocity of point of intersection of two ...

if there are two points which are at a vertical distance h from each other and under the influence of g then find the equation of a path under which if the body is allowed to fall will take minimum time to travel that distanc ...

Does it always mean that when two bodies are in contact then there should be some contact force between the two? ...

Two identical cubical blocks of side l are placed on a smooth horizontal surface.A sphere of mass m is placed on the two blocks in order to fill in the gap between them.The system is kep at rest.Find the contact force on the ...

True or false: An electric line of force( i.e electric field) in the x-y plane is given by the equation x2 +y 2 =1 . A particle with unit positive charge, initially at rest at (1,0) in the xyplane, will move along the line of ...

A uniform rod of mass M and length l is hinged about the mid point O so that it can freely rotate on OXY plane about the OZ axis. An impulse J is applied at the end of the rod as shown. The angular velocity of the rod, immedi ...

1.in a uniform electric field, potential at origin is V, and V/2 at (a,0,0),(0,b,0),(0,0,c).The potential at (a,b,c) 2.A metal sphere of radius r caries a total charge Q, what is the force of repulsion between the two hemisph ...

1)what is meant by radial magnetic field?? 2)while converting galvanometer into ammeter why we connect small resistance parallel to galvanometer? ...

A uniform bar is pivoted about one end. Initially it is held vertical and allowed to fall. When its angular displacement is 180°, its acceleration is a) g b) 2g c) 3g d) 4g sry i can't confirm the answer ...

Calculate the gravitational field and potential at a point on the axis of an uniform circular disc of mass m and radius r at a distance z from the centre of the disc. ...

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1. A set of 25 tuning forks is arranged in order of decreasing frequency. Each fork gives 3 beats with succeeding one. The 1st fork is octave of the last . Calculate the frequency of the 1st and the last forks. what does the ...

Happy Saraswati Puja to one and all.... May Goddess Saraswati Bless you with knowledge and Wisdom..... ...

A rigid insulated wire frame in the form of a right angle triangle,ABC is set in a vertical plane as shown in figure.Two beads of equal masses m and carrying charges q1 and q2 are connected by a cord of lenght l and can slide ...

Suppose a disc of radius a placed on the ground with uniform surface charge density s with its axis vertical.A charged particle is dropped from a height H from the ground along the axis of the disc.Initially the particle is a ...

A uniform cylinder of radius R is spinning about its axis to an angular velocity w0 and then placed in a corner.The coefficient of friction beween the orner walls and the cylinder is k.How many turns will the cylinder accompl ...

Derive the moment of inertia of a rectangular plate having sides a and b about an axis passing through one end and perpendicular to the plate. ...

voltmeters V1 and V2 are connected in series across a d.c. line . V1 reads 80V and has a per volt resistance of 200 ohm , V2 has a total resistance of 32000 ohm . the line voltage is ...

Figure below shows six concentric conducting spheres A,B,C,D,E and F with radii R,2R,3R,4R,5R and 6R respectively.Conducting spheres B and C & D and E are connected using conducting wires as shown in figure.Find the equivalen ...

A cylinder of Radius R lies on a horizontal surface. What is the minimum possible speed with which a stone can be projected so that it is just able to cross the cylinder? ...

A force F1=Aj is applied to a point whose radius vector r1=ai,while a force F2=Bi is applied to the point whose position vector r2=bj.Both radius vectors are determined relative to the origin of co-ordinates O,i andj are the ...

A system of four equal charges is placed on a table forming a square.The configuration which satisfy the condition that electric field at point on the axis passing through the centre and perpendicular to the plane of the squa ...

Three charges of equal magnitude are placed at the corners of an equilateral triangle ABC.The configuration of charges in which resultant electric field is towards point A is: (A)+++ (B)+-+ (C)-++ (D)++- ...

Please tell me which one of the following is the best to prepare for IIT-JEE (i) Bansal classes (ii) Resonance (iii) Fiitjee (iv) Brilliant Tutorials (v) Narayana Thanks in Advance Rahul Mishra....:P ...

A simple pendulum made up of light rod of length L and bob of mass m has a spring of force constant k connected to it at a distance x below the pt. of suspension. Find the frequency of vibration of the system. ...