Recently Active Physics Questions

[ These qs r too easy I agree but there r some crunches in the ans given So i din't dare to take risk] Which of the following functions of A & B is possibility correct if A & B possess diff dimensions? (A) A/eA/B (B) B/log(A/ ...

A capillary is dipped in water vessel kept on a freely falling lift, then a)water will not rise in the tube b)water will rise to the maximum possible height of the tube ...

MULTIPLE ANS QS Select the incorrect statement(s) : (A)Tom pushes Jerry with a force of 100N If Jerry accelerates , the force exerted by Jerry on Tom will be less than 100 N (B)Newton's first law can be derived from 2nd law ( ...

A galvanometer is to be converted into an ammeter or voltmeter.In which of the following cases is the resistance of the device maximum : (a)Ammeter with range 10 A (b)Voltmeter of range 5V (c)Ammeter of range 5 A (d) Voltmete ...

in a given system of units 1 unit of mass = 2Kg , i unit of length = 5 m & i unit of time = 5 sec Then , in this new system , 2 N =? ...

15 identicle capacitances each of 1uf are conected in a hexagonal network ABCDEF such taht each vertex is connected with each of the others directly by 1uf cap...the cap and wires r insulated from each oder(imagine ech of the ...

this question may come(my intuiion) as comprehension in jee 2010 *Image* ...

IF THERE R N PTS ON A CIRCLE THEN HOW MANY TRIANGLES R FORMED INCLUDING THE SMALLER TRIANGLES. ...

An annular ring of internal and outer radii r and R respectively oscillates in a vertical plane about a horizontal axis perpendicular to its plane and passing through a point on its outer edge. Calculate its time period. ...

A tube of length 30 cm has its inner lateral surface blackened.Two lenses of focal length 10 cm and 20 cm are fixed at the end of the tube.for the same beam intencities on the screen are I1 and I2 for arrangement 1 and 2 resp ...

*Image* Using KIRCHOFFS laws calculate the PD across 8Ω resistor ...

*Image* Suppose a railroad car of mass M is present. (in the picture it's the box) . A pendulum (length of string=l) is held at rest at an angle alpha with the vertical. The bob of the pendulum has a mass m. Find the velocity ...

i wonder y i never asked it before.....its my age old doubt.......but now i am going to prove sumthing......... WHAT??? that neone who says that any vector has zero magnitude component in a direction perpendicular to it is ho ...

A point charge q moves from point P to point S along the path PQRS in a uniform field E pointing parallel to the positive direction of the X-axis.The coordinates of the point P,Q,R and S are (a,b,0),(2a,0,0),(a,-b,0) and (0,0 ...

*Image* Find R so that load voltage remains 18 volts as input voltage is free to vary from 22 V to 28 V.Zener diode shown can maintain a constant voltage of 18 V for I between 2mA and 200mA.Rl(load resistance) is 18ohm ...

Maybe these are too tough , maybe very easy , but I would definitely appreciate a good solution of these problems ---- Find 1 > The gravitational field on a point mass due to an infinitely unstreachable thread of density p ...

A heavy load of mass m is suspended by a light spring of spring constant k. The spring is slowly pulled down at the mid-point(a certain work A is done thereby) and then released. Find: I)The maximum kinetic energy of the load ...

1.A water tank filled with water stands on a horizontal table top.The level of water is at a height H from the bottom of the tank.The tank together with the water weighs W.The side of the water tank has at the bottom a plugge ...

Three small bodies with mass ratio 3:4:5(mass of the lightest body being m) are kept at three different points on the inner surface of a smooth hemispherical cup of radius r .The cup is fixed at its lowest point on a horizont ...

A piece of straight conducting wire 1m long is held horizontally at a height pointing east to west.Then the wire is let fall freely.Find the difference of potential between the ends of the wire after 1 second.Horizontal compo ...

An empty pressure cooker (Volume=10 lts) contains air at atm. pressure 105 Pa at a Temp. of 270C. It contains a whistle with area 0.1cm2 & mass=100gm. What should be the Temperature of air inside so tht the whistle is just li ...

*Image* Now,the block is shifted l/2 from the given position in such a way it compresses a spring and released. Find the time period of oscillation. ...

*Image* A sphere is rolling on a rough surface without slipping at the point of contact.Find the radius of curvature of the trajectory of point A when it is R/2 distance about the centre of the sphere.Velocity of COM is V ...

One of my old doubts ; still unsolved.... *Image* (P.S. I don't have the answer) ...

I am facing problem as to when and where to conserve Linear momentum of a system and where to conserve the angular momentum of a system. can the linear momentum be conserved when angular momentum is already conserved? ...

ASSERTION &REASONING STATEMENT 1: A +ve charged sphere & a -ve charged sphere r kept at finite distance. The total electrostatic P.E. of system must b -ve. STATEMENT 2: P.E. btwn 2 like charge particles is +ve & -ve for 2 unl ...

a man is on a boat which floats in a pond.The man jumps into the water.at the time when the man is inside water completely the level of water will a)be same b)inc c)dec wont it be same ?? just forgive me for asking a silly qu ...

Question. A uniform solid cylinder made of steel is compressed along the axis. Which of the following statements are correct?? (A) Decrease in volume of the cylinder is independent of its area of cross-section but directly pr ...

Sir I am facing problems in solving the problems of NewtonsLaw especially those of pulleys.Please help. ...

1)For an LR circuit at t=0 , rate at which magnetic energy gets stored in the inductor (A)Decreases continuously (B)Increases continuously (C) First increases and then decreases (D)First decreases & then increases ...