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Electronics — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsElectronics1 Mark
Question
In a diode valve the cathode temperature must be (f = work function)(a) High and ∅  should be high(b) High and ∅ should be low(c) Low and ∅ should be high(d) Low and ∅ should be high
   
   
✓

Answer

(b) High and ∅ should be low

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