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Peltier effect (J.C.A. Peltier; 1834)
The change in temperature generated at a junction among two dissimilar metals or semiconductors while an electric current flow through the junction.
what is band gap?
to calculate average speed, divide distance by time?
explain compound microscope
Cathode rays, discovered by Sir Willium Crooke are the stream of electrons. They may be given by using a discharge tube containing gas at a low pressure of the order of 10-2 mm of
If a meteorite hit the Earth and moved it 2.41x 10 10 m closer to Venus, How many days would there be in an Earth year?
Questions: A source charge generates an electric field to exist in the region of space around that source charge. The electric field exerts a force on some test charge that fin
How is temporal coherence key of characteristics of laser? Temporal coherence: This coherence is a measure of the correlation among the phases of a light wave at various poi
Q. A beam of electrons travelling with a speed of 4 X 10 7 ms -1 is projected normal to a magnetic field of B = 10 -3 Wb m -2 . What is the path of the beam in the magnetic fiel
1. A very narrow laser beam is shone into a sphere of solid glass that has uniform refractive index n>1 and radius ρ . The beam makes an angle α in air with the normal to the surf
Derivation
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