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(i) The procedure of ejection of electrons from a metal surface by the application of heat is known as thermionic emission and emitted electrons are known as thermions and current flowing is known as thermion current.
(ii)Thermions have dissimilar velocities.
(iii)This was discovered by Edison
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Given the ratio of velocities of two light waves traveled in vacuum and having wave lengths 5000A o and 6000A o . Can you explain by working of diamonds sparkle?
assignment
Illustrate V - I graph for ohmic and non-ohmic materials. Give one example for each.
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which one of the following engine has thr highest effeciency carnot engine or rankine engine or otto engine?
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