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A radiation of 500nm is incident on a metal surface whose work function is 3ev.why do we not observe the phenomenon of photoelectric effect? Ans) Because the energy of radiation i
Displacement: - The modification in position of a body in a certain direction is known as displacement. It is a vector function and its unit in SI system is meter.
The device which changes chemical energy into electrical energy is called as electric cell. Battery is a host of constant emf but not constant current.
what is friction force? why does opposes the motion?
moving coil galvanometer
a small object is 10cm in front of a plane mirror if you stand behind the object 30cm from it and look at its image for what distance must you focus your eyes
Working of Single –phase induction motor Working : Construction of a single -phase motor is same to that of a three -phase induction motor except that the stator is given wit
Q. A 4.5cm needle is placed 12cm away from a convex mirror of focal length 15cm. Give the location of the image and the magnification. Describe what happens as the needle is moved
how can sensitivity curve b measured?
Mach number (E. Mach): The ratio of the speed of an object in a provided medium to the speed of sound within that medium. Mach's principle (E. Mach; c. 1870) The inert
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