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Current Amplification Factor Formula

GoCurrent Amplification Factor using Base Transport Factor Formula

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Current Amplification Factor in a BJT transistor is defined as the ratio of output current to its input current. Check FAQs

α = \frac{I c}{I e}

α - Current Amplification Factor?I_c - Collector Current?I_e - Emitter Current?

Current Amplification Factor Example

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With units

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Here is how the Current Amplification Factor equation looks like with Values.

Here is how the Current Amplification Factor equation looks like with Units.

Here is how the Current Amplification Factor equation looks like.

0.4 = \frac{1.1}{2.75}

0.4 = \frac{1.1mA}{2.75mA}

0.4 = \frac{1.1}{2.75}

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Current Amplification Factor Solution

Follow our step by step solution on how to calculate Current Amplification Factor?

FIRST Step Consider the formula

α = \frac{I c}{I e}

Next Step Substitute values of Variables

∴

α = \frac{1.1mA}{2.75mA}

Next Step Convert Units

∴

α = \frac{0.0011A}{0.0028A}

Next Step Prepare to Evaluate

∴

α = \frac{0.0011}{0.0028}

LAST Step Evaluate

∴

α = 0.4

Current Amplification Factor Formula Elements

Variables

Current Amplification Factor

Current Amplification Factor in a BJT transistor is defined as the ratio of output current to its input current.

Symbol: α

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Current Amplification Factor

Collector Current

Collector current is defined as the current flowing through the collector terminal of a transistor.

Symbol: I_c

Measurement: Electric CurrentUnit: mA

Note: Value should be greater than 0.

Formulas to find Collector Current

Emitter Current

Emitter current is defined as the current flowing through the emitter terminal of a bipolar junction transistor.

Symbol: I_e

Measurement: Electric CurrentUnit: mA

Note: Value can be positive or negative.

Formulas to find Emitter Current

Other Formulas to find Current Amplification Factor

Go Current Amplification Factor using Base Transport Factor

α = \frac{β}{β + 1}

Other formulas in Transistor Operating Parameters category

Go Emitter Current

I e = I b + I c

Go Collector Current using Base Transport Factor

I c = β \cdot I b

Go Collector Current using Current Amplification Factor

I c = α \cdot I e

Go Common Collector Current Gain

A i = β + 1

How to Evaluate Current Amplification Factor?

Current Amplification Factor evaluator uses Current Amplification Factor = Collector Current/Emitter Current to evaluate the Current Amplification Factor, Current Amplification Factor in a BJT transistor is defined as the ratio of output current to its input current. In a common base configuration, current amplification factor is the ratio of collector current to the emitter current. Current Amplification Factor is denoted by α symbol.

How to evaluate Current Amplification Factor using this online evaluator? To use this online evaluator for Current Amplification Factor, enter Collector Current (I_c) & Emitter Current (I_e) and hit the calculate button.

FAQs on Current Amplification Factor

What is the formula to find Current Amplification Factor?

The formula of Current Amplification Factor is expressed as Current Amplification Factor = Collector Current/Emitter Current. Here is an example- 0.714 = 0.0011/0.00275.

How to calculate Current Amplification Factor?

With Collector Current (I_c) & Emitter Current (I_e) we can find Current Amplification Factor using the formula - Current Amplification Factor = Collector Current/Emitter Current.

What are the other ways to Calculate Current Amplification Factor?

Here are the different ways to Calculate Current Amplification Factor-

Current Amplification Factor=Base Transport Factor/(Base Transport Factor+1)

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