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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
what happens if lc oscillations circuit is placed in dielectric chamber?
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It makes sense that copper should be used because it could heat up faster, making the event more efficient.
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