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Semiconductor Electronics: Materials, Devices and Simple Circuits

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A change of 8.0 {~mA} in the emitter current brings a change o

Question

Medium

Solving time: 3 mins

A change of $8.0 mA$ in the emitter current brings a change of $7.9$ $m A$ in the collector current. How much change in the base current is required to have the same change $7.9 mA$ in the collector current? Find the values of $α$ and $β$

Views: 6,063 students

Book:

Optics And Modern Physics (DC Pandey)

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Lucas Discussed

A change of

8.0 mA

in the emitter current brings a change of

7.9

m A

in the collector current. How much change in the base current is required to have the same change

7.9 mA

in the collector current? Find the values of

α

and

β

6 mins ago

Discuss this question LIVE

6 mins ago

Text solutionVerified

We know that,

∴

i_{e} Δ i_{e} Δ i_{b} = i_{b} + i_{c} = Δ i_{b} + Δ i_{c} = Δ i_{e} - Δ i_{c}

Substituting the given values of the question,
We have

Δ i_{b} = (8.0 - 7.9) mA = 0.1 mA

Hence, a change of

0.1 mA

in the base current is required to have a change of

7.9 mA

in the collector current.
Further,

α = \frac{i _{c}}{i _{e}} or \frac{Δ i _{c}}{Δ i _{e}} β = \frac{i _{c}}{i _{b}} or \frac{Δ i _{c}}{Δ i _{b}} = \frac{7.9}{8.0} = 0.99 = \frac{7.9}{0.1} = 79

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Question Text	A change of $8.0 mA$ in the emitter current brings a change of $7.9$ $m A$ in the collector current. How much change in the base current is required to have the same change $7.9 mA$ in the collector current? Find the values of $α$ and $β$
Topic	Semiconductor Electronics: Materials, Devices and Simple Circuits
Subject	Physics
Class	Class 12
Answer Type	Text solution:1
Upvotes	104

A change of $8.0 mA$ in the emitter current brings a change of $7.9$ $m A$ in the collector current. How much change in the base current is required to have the same change $7.9 mA$ in the collector current? Find the values of $α$ and $β$

Text solutionVerified

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A change of 8.0 mA in the emitter current brings a change of 7.9 mA in the collector current. How much change in the base current is required to have the same change 7.9 mA in the collector current? Find the values of α and β

Text solutionVerified

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A change of $8.0 mA$ in the emitter current brings a change of $7.9$ $m A$ in the collector current. How much change in the base current is required to have the same change $7.9 mA$ in the collector current? Find the values of $α$ and $β$