The dynamic plate resistance of a triode valve is 10 kΩ. Find the change in the plate current if the plate voltage is changed from 200 V to 220 V.
Given rp=10 KΩ = 104Ω, VP1=200V, VP2=220 V
The dynamic resistance of triode is defined as,
where ΔVp is the change in plate voltage and Vg is the grid voltage and ΔIp is the change in plate current
1