SATHEE: Electronic Devices Question 253

Electronic Devices Question 253

Question: The linear portions of the characteristic curves of a triode valve give the following readings $V_{g}$ (volt) 0 ? 2 ? 4 ? 6

$I_{p} (m A)$ for $V_{p} = 150$ volts 15 12.5 10 7.5 $I_{p} (m A)$ for $V_{p} = 120$ volts 10 7.5 5 2.5 The plate resistance is

[Roorkee 1985]

Options:

A) 2000 ohms

B) 4000 ohms

C) 8000 ohms

D) 6000 ohms

Show Answer

Answer:

Correct Answer: D

Solution:

$g_{m} = (\frac{Δ i_{p}}{Δ V_{g}})_{V_{p} = constant}$ =

$\frac{(15 - 10) \times 10^{- 3}}{0 - (- 4)} = 1.25 \times 10^{- 3} Ω$

$μ = {(\frac{Δ V_{p}}{Δ V_{g}})}_{I_{p} = constant}$ =

$\frac{150 - 120}{0 - (- 4)} = 7.5$

$r_{p} = \frac{μ}{g_{m}} = \frac{7.5}{1.25 \times 10^{- 3}} = 6000$ ohms

Electronic Devices Question 253

Question: The linear portions of the characteristic curves of a triode valve give the following readings $V_{g}$ (volt) 0 ? 2 ? 4 ? 6

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

Electronic Devices Question 253

Question: The linear portions of the characteristic curves of a triode valve give the following readings Vg (volt) 0 ? 2 ? 4 ? 6

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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Question: The linear portions of the characteristic curves of a triode valve give the following readings $V_{g}$ (volt) 0 ? 2 ? 4 ? 6