Q. In a diode valve the cathode temperature must be $(\phi =$ work function)
A) High and $\phi$ should be high
B) High and $\phi$ should be Low
C) Low and $\phi$ should be high
D) Low and $\phi$ should be low
Explanation
The correct answer is Option B: High and $\phi$ should be Low.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.