SATHEE: Electronic Devices Question 205

Electronic Devices Question 205

Question: With a change of load resistance of a triode, used as an amplifier, from 50 kilo ohms to 100 kilo ohms, its voltage amplification changes from 25 to 30. Plate resistance of the triode is

[MP PET 1986]

Options:

A) 25 kW

B) 75 kW

C) 7.5 kW

D) 2.5 kW

Show Answer

Answer:

Correct Answer: A

Solution:

Voltage amplification $A_{v} = \frac{μ}{1 + \frac{r_{p}}{R_{L}}}$
$\Rightarrow 25 = \frac{μ}{1 + \frac{r_{p}}{50 \times 10^{3}}}$ ……(i) and $30 = \frac{μ}{1 + \frac{r_{p}}{100 \times 10^{3}}}$ ……(ii) an solving equation (i) and (ii), $ r _{p}=25k\Omega .

Electronic Devices Question 205

Question: With a change of load resistance of a triode, used as an amplifier, from 50 kilo ohms to 100 kilo ohms, its voltage amplification changes from 25 to 30. Plate resistance of the triode is

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 205

Question: With a change of load resistance of a triode, used as an amplifier, from 50 kilo ohms to 100 kilo ohms, its voltage amplification changes from 25 to 30. Plate resistance of the triode is

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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