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Due to drift velocity of electrons and due to collision of electrons
The threshold of hearing is 10 -12 watts/m 2 or 0 dB. How many times more intense than the threshold of hearing is 70dB and what is the actual intensity (in watts/m 2 ) at the 7
The current in an RL circuit builds up one-third of its steady value in 4.56s. Find the inductive time constant.
Coupling factor: If all the flux of a primary coil links with all the turns of a secondary then 100% coupling exists. Sometimes it is more convenient to use a coupling factor
A figure separated into squares, each of size 1 mm 2 is being viewed at a distance of 9cm by a magnifying lens of local length 10cm, held close to the eye. (i) Illustrate a ray
Define term coherence as the characteristics of laser. Coherence: The light from a laser is called be highly coherent that implies the waves of laser light are in similar
In an electric field difference among potential energy of two points A and B is described as equal to the amount of work done (by external agent) in moving a unit positive charge f
Three charges are arranged on the vertices of an equilateral triangle. Find the dipole moment of the combination ? Take any of two charges and search their dipole moment.(charg
The physical value which does not depend on any other physical quantity is known as a fundamental physical quantity like length; mass and time are known as fundamental units.
Q. Regard as two small metal balls one having a charge of +1 micro-coulombs and the other having a charge of +3 micro-coulombs. The balls are get into momentary contact with e
An army plane wants to drop supplies to a group of physics students stranded on an island. In order for the package to land on the island, the pilot needs to drop the package befor
Because there is nothing ideal conductor in this world.
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