Ans
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1.(Ohms law cannot be applied to discharge tubes)and 2.(because the current doesnot depend upon the speed of electrons but rather on the n.o of electrons,even though the speed of electrons increase but the electron flux remains the same because the electron flux depends on the incident photons on the metal plate,as long as the photon flux is constant the electron flux is constant and hence the current remains constant irrespective of the increase of voltage and electron speed) hope it helps.
6 years ago
by
Zac Zayn