Wave Optics

Question

The slope of plate characteristic and mutual characteristic curves of a triode valve is 0.02 mA / V and 1 mA / V. The amplification factor of triode valve is

$2 \times 10^{8}$

20

50

40

Solution

$Triode amplification factor μ slope of anode charecteristics = \frac{∆ V_{a}}{∆ V_{g}} = \frac{1 mA / V}{0.02 mA / V} = 50$