Question

The slope of plate characteristic of a vacuum tube diode for certain operating point on the curve is $10^{- 3}\frac{mA}{V}$. The plate resistance of the diode and its nature respectively

• A. 100 kilo-ohms static
• B. 1000 kilo-ohms static
• C. 1000 kilo-ohms dynamic
• D. 100 kilo-ohms dynamic

Answer 1

Answer: (B)

1000 kilo-ohms static

Answer 2

Plate resistance

$= \frac{1}{\text{slope}} = \frac{1}{10^{- 3} \times 10^{- 3}} = 10^{6}\Omega$ = 1000 kΩ (static).