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Explain the term 'work function' of a metal. The threshold frequency of a metal is f0. When the light of frequency 2f0 is incident on the metal plate, the maximum velocity of electrons emitted is v1. When the frequency of the incident radiation is enhanced to 5f0, the maximum velocity of electrons emitted is v2. Find the ratio of v1 to v2.
A measuring jar or graduate Select several straight-sided glasses jars of assorted sizes. Olive bottles are very useful for the making of graduated cylinders. Paste a strip of
The greenhouse effect is significant not only on Earth but also on Venus and Mars. The following table summarizes the following basic observations: (A) Using Stefan's equa
What is the raw file size for an image of 80 rows and 100 columns, with pixels on 14 bits and with an extra row for the header? The minimum and maximum values observed in a
Beats: The periodic vibrations in intensity or loudness of sound because of superposition of two sound waves of similar amplitude and slightly different frequencies are known a
Q. Give one merit of a scanning electron microscope over a transmission electron microscope? Answer:- The SEM has turn into more popular than the TEM as it can produce ima
The color of sky is blue but the wavelenght of violet and indigo is small than that of blue.Then why the color of sky is blue? Ans) The particles in the atmosphere are able to
How many types of hologen and gas discharge are there? This will depend upon the use of the system. Gas discharge lamps, particularly those with a very small plasma area are pr
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.
Q. State any three uses of IR rays. (a) Infrared lamps are utilized in physiotherapy. (b) Infrared photographs are utilized in weather forecasting. (c) As infrared radia
A modern turbofan engine in a commercial jet takes in air, part of which passes through the compressors, combustion chambers, and turbine, and the rest of which bypasses the compre
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