Recently Active Physics Questions

can u plz help me out on this one.. A point source of light is placed at a certain depth below the surface of a large deep lake.show that the fraction of light energy that escapes directly from water is given by 1/2 -1/2n n^2 ...

i wanted a list of good books that are to be followed for physics,chemistry,maths...which will have all the possible explanation of a particular chapter.... ...

what should be antiproton which is anti particle of proton? ...

Why cannot we use the ampere's circuital law while finding the magnetic field of a wire of finite length? Though we can very easily use it when the wire is of infinite length. ...

A spaceship is sent to investigate a planet of mass M and radius R. While hanging motionless in space at a distance of 5R from the centre of the planet, the spaceship fires an instrument package with a speed V at an angle the ...

A machine gun of mass M/4 is mounted on a plank of mass 3M/4. The barrel of the gun is inclined at an angle of θ with the horizontal. The plank is moving on a smooth horizontal surface in x-y plane of a coordinate system alo ...

when the object is at distance u1 & u2 the images formed by d same lens are real n virtual resp and of same size .d focal length of the lens (a)1/2√u1+u2 (b)1/2(u1+u2) (c)√u1u2 (d)2(u1+u2) ...

*Image* a converging lens of focal length 20 cm n diameter 5cm is cut along the line AB.the part of the lens shown shaded in the diagram is now used to form an image of a pt Pplaced 30 cm away frm it on d line XYwhich is prep ...

This question was asked in today's physics boards: "Draw three equipotential surfaces corresponding to a field that uniformly increases in magnitude but remains constant along z - direction. How are these surfaces different f ...

STAT 1: A highly intense red light is going from one transparent medium to another, on coming into second medium the light colour remains red in colour but the intensity will decrease. STAT 2: Colour of light depends upon fre ...

A cylindrical vessel is filled with equal amounts by weight of water and mercury.The overall height of the two layers is 29.2. Determine the pressure of the liquid at the bottom ? density of hg= 13.6.... i found out the heigh ...

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i have some doubts in hcv hope you all will help me hc verma page 364 volume 2 objective 1 question 9 .... my answer is coming out a and i dun knoe wat mistake m making question 10 and objective 2 question 5 both contradict i ...

explain why a spinning cricket ball in air does not follow a parabolic trajectory? why bridge made upper at middle or straight brtidge but not middle lower why? ...

A barometer tube of negligible mass is suspended from a spring balance as shown. The mass of mercury in the tube is m and atmospheric pressure is p0 . The cross section area of tube is A. What is the reading of spring balance ...

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Q40 A uniform solid cylinder of density 0.8 g/cc floats in equilibrium in a combination of two non-mixing liquids A and B with its axis vertical. The The densities of liquids A and B are 0.7 g/cc and 1.2 g/cc. The height of l ...

An FM signal has a resting frequency of 105 Mhz and highest frequency of 105.03 Mhz ,when modulated by a signal. Then the carrier swing is? ...

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A solid non conducting sphere has charge distribution as shown in the figure. Radius and mass of sphere is R and m.. a constant electric field E0 is switched on as shown and sphere is displaced by small angle θ. there is fri ...

system shown of mass m is displaced in its plane by a small angle θ, find the period of oscillation *Image* I wud essentuially want to know the approach to this type of questions? ANS : 2π 2( 2) l/3g ...

*Image* THE ANSWER IS 27μC ???? ...

There has been a fite wid my friend..........please tell d answer(correct) An artificial radioactive isotope gave 14N7 after two successive beta emissions. The number of neutrons in the parent nucleus is a...5 b...7 c...9 d.. ...

What are the disadvantages of cars like this : *Image* ...

kal paper hai aur mujhe logic gates ko chor kar sab kuch aata hai.......plzzzzz meri help karo aur cbse type answer do.......... all are ncert problems............mere paas koi help book nahin hai........[2][2] Q1 *Image* Q2 ...

Q1. Two particles 1and 2 move with constant velocities v1 and v2 .At the initial moment their radius vectors are equal to r1 and r2. How should these four vectors be interrelated for the particles to collide? I could not unde ...

These are conceptual questions for all....... Whats direction of friction on cylinder in each case............. *Image* ...

A convex lens of focal length 10 cm is placed coaxially 5cm away from a concave lens of focal length 10cm. If an object is placed 30cm in front of convex lens, find the position of final image formed by combined system. me ge ...

Maybe I am blind.........but cant understand this one......... An electron of Kinetic energy K collides elastically with stationary hydrogen atom in ground state.Then Kmax=? ...