HC Verma: Concepts of Physics - Volume 2 Electric Current through Gases Pages 352-354: Q16 Solution: Find the values of , and of a triode operating at plate voltage …

QPages 352-354: Q16: HC Verma: Concepts of Physics - Volume 2 Electric Current through Gases Pages 352-354: Q16 Solution: Find the values of , and of a triode operating at plate voltage …

Find the values of

r_p

\mu

and

g_m

of a triode operating at plate voltage 200 V and grid voltage -6. The plate characteristics are shown in the figure.

Step-by-Step Verified Solution

**Answer:**

r_p = 8 \text{ k}\Omega

g_m = 2.5 \text{ millimho}

\mu = 20

. **Step-by-Step Explanation:** From the figure, at constant

V_g = -6

V: - At

V_p = 240

I_p = 13

mA; at

V_p = 160

I_p = 3

mA.

r_p = \frac{240 - 160}{(13 - 3) \times 10^{-3}} = \frac{80}{10} \times 10^3 = 8 \text{ k}\Omega

At constant

V_p = 200

V: - At

V_g = -4

I_p = 13

mA; at

V_g = -8

I_p = 3

mA.

g_m = \frac{(13 - 3) \times 10^{-3}}{(-4) - (-8)} = \frac{10 \times 10^{-3}}{4} = 2.5 \text{ millimho}

\mu = r_p \times g_m = 8000 \times 2.5 \times 10^{-3} = 20

QPages 352-354: Q16: HC Verma: Concepts of Physics - Volume 2 Electric Current through Gases Pages 352-354: Q16 Solution: Find the values of , and of a triode operating at plate voltage …

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