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Q. Movement of principal ray? In every case a principal ray moves from the head of the object to the plane of the lens. It passes through the plane of the lens as well as conti
Q. What is the force essential to accelerate a mass of one kilogram one meter per second per second? Answer:- Fundamentally you have defined the Newton. Force is the ve
A bird flies in the east direction with a speed of 5 ms-1. The wind is blowing towards north at a speed of 3 ms-1. Determine the relative velocity of the bird with respect to the w
A train locomotive whose mass is 1 x 106 kilograms is travelling EAST at a speed of 100 kilometers per hour. A NORTHERLY wind is applying a force of 100 Newtons on the locomo
Hard Ferromagnetic Substances: Those substances that do not lose their magnetism or removing from magnetic field are known as hard magnetic substance such as steel.
Which of the subsequent is a principal ray for the case of an actual physical object and a convex (converging) lens? Indicate all that apply. Ans: In the thin lens approxi
Cannon of mass 5m (having a shell of mass m) is at rest on a smooth horizontal ground fires the shell with its barrel at an angle A with the horizontal at a velocity u relative to
State Gauss' theorem in electrostatics. Using this theorem, derive the expression for the electric field intensity at any point outside a uniformly charged thin spherical shell.
Permittivity of free space; electric constant; epsilon_0 The ratio of the electric displacement to the intensity of the electric field generating it in vacuum. This is equal to
Simple 'spring' balance Punch four holes in an old tin lid with a nail, spacing them partially round the circumference. Pass pieces of string by these holes and tie them togeth
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