SATHEE: Electronic Devices Question 25

Electronic Devices Question 25

Question: In the study of transistor as an amplifier, if $α = I_{c} / I_{e}$ and $β = I_{c} / I_{b},$ where $I_{c}, I_{b}$ and Ie are the collector, base and emitter currents, then

[CBSE PMT 2000; KCET 2000; Orissa JEE 2005]

Options:

A) $β = \frac{1 - α}{α}$

B) $β = \frac{α}{1 - α}$

C) $β = \frac{α}{1 + α}$

D) $β = \frac{1 + α}{α}$

Show Answer

Answer:

Correct Answer: B

Solution:

As we know $i_{E} = i_{C} + i_{B}$
$\Rightarrow \frac{i_{e}}{i_{c}} = 1 + \frac{i_{b}}{i_{c}}$
$\Rightarrow \frac{1}{α} = 1 + \frac{1}{β}$
$\Rightarrow β = \frac{α}{1 - α}$ .

Electronic Devices Question 25

Question: In the study of transistor as an amplifier, if $α = I_{c} / I_{e}$ and $β = I_{c} / I_{b},$ where $I_{c}, I_{b}$ and Ie are the collector, base and emitter currents, then

Options:

Answer:

Solution:

Engineering Preparation

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NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

Electronic Devices Question 25

Question: In the study of transistor as an amplifier, if α=Ic/Ie and β=Ic/Ib, where Ic,Ib and Ie are the collector, base and emitter currents, then

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: In the study of transistor as an amplifier, if $α = I_{c} / I_{e}$ and $β = I_{c} / I_{b},$ where $I_{c}, I_{b}$ and Ie are the collector, base and emitter currents, then