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1. The temperature of cathode is increased from 2500K to 2600K. The increase in thermionic emission current is about





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MCQ->The temperature of cathode is increased from 2500K to 2600K. The increase in thermionic emission current is about....
MCQ->Assertion (A): When cathode temperature is increased from 2500 K to 2550 K, thermionic emission current may increase by about 50%.Reason (R): Thermionic emission current ∝ T2 e-Ew/kT.

....
MCQ->Assertion (A): At a temperature of 1000 K, thermionic emission current is about 0.1 A/cm2 of surface.Reason (R): Thermionic emission current is given by Ith = SA0 T2 e-Ew/kT.

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MCQ->The energy to cause thermionic emission is supplied by heating the cathode.....
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