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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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Infrared Waves: Infrared wave also known as heat wave. These waves are radiation by hot body at dissimilar temperature.
what multiplication fact can be found by using the arrays or 2times9 and 5times9?
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Ask question #Minimum 100 words how is temperature coefficient of resistance helpful to mankind?accepted#
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What i the name given to that kind of electromagnetic spectrum which is used for taking photographs of earth under foggy conditions from great heights?
if in an interference pattern,the ratio between maximum and minimum intensities is 36:1,find the ratio between the amplitude and intensities of the two interfering waves.
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When we move from a positive charge towards an equal negative charge along the line joining the two then initially potential reduces in magnitude and at centre changes into zero, b
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