MCQ
The grid in a triode valve is used
- ATo increases the thermionic emission
- ✓To control the plate to cathode current
- CTo reduce the inter-electrode capacity
- DTo keep cathode at constant potential
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$(A)$ For $n=1.42, h=50 \ cm$ $(B)$ For $n=1.35, h=36 \ cm$ $(C)$ For $n=1.45, h=65 \ cm$ $(D)$ For $n=1.48, h=85 \ cm$

