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Write down the relation between focal length and power of a lens. Write down the expression for the equivalent focal length of two thin lenses separated by a distance.
what is electrostatic shielding
A ray of light falls on a glass slab of refractive index u.if the reflected and refracted rays are mutually perpendicular to each other,find the angle of incidence. Ans) let i b
Convex lens can be used as a magnifying glass. When an object that is 15.0 cm from the lens has an image that is exactly 55 times the size of the object, what is the focal leng
Examples of systems in equilibrium: a) a stone resting on the ground; b) a pencil balanced on your finger; c) a ladder placed against the wall, an aircraft flying at a co
Nuclear Reactor: During fission large amount of energy is free in the form of heat. A system, which is used to get controlled amount of heat energy from nuclear fission is know
What is the principle and ray diagram of a compound microscope
Q. Define: Thomson effect. Thomson recommended that when a current flows through unequally heated conductors heat energy is absorbed or evolved throughout the body of the meta
a boy throws a ball of mass 20 kg vertically upwards.it raises to a maximum height of 100 m.at what height will the kinetic energy be reduced to 70%
A boy is standing on an elevator which is traveling downward with a constant velocity of 30 meters per second. The boy throws a ball vertically upward with a velocity of 10 meters
The Schottky diodes are a semiconductor diode with a low forward voltage drop and a very fast switching action. The voltage drop at forward biases of around 1ma is in the range 0.1
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