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:

• A. $2\times 10^{8}$
• B. $20$
• C. $50$
• D. $40$

Answer 1

Answer: (C)

$50$

Answer 2

$\eta=$ amplification factor $=\frac{ S / \text { mututud chat }}{ S / \text { plate cha }}$ $=\frac{1 \,m A / V }{0.02 \,m A / V }$ $=\frac{100}{0.02}=50$