Electronic Devices and Circuits - Engineering

Q1:

If ib is plate current, eb is plate voltage and ec is grid voltage the v-i curve of a vacuum triode is
ib = 0.003 (eb + kec)n. Typical values of k and n are

A 0.5 and 1

B - 2 and 1

C 30 and 1

D 30 and 1.5

ANS:D - 30 and 1.5

k has to be much higher than 1 so that grid is effective in controlling plate current n is not 1 because it is a nonlinear device.