Question

In a bipolar junction transistor:

• A. Collector Current IC = Emitter Current IE = Base Current IB
• B. Emitter Current IE = Collector Current IC – Base Current IB
• C. Base Current IB = Emitter Current IE + Collector Current IC
• D. Base, emitter, and collector currents are equal

Hint:

The relationship between the currents is IE = IB + IC. Note that base current is a control current in the BJT that is used to amplify the output signals.

Answer 1

The Correct Option is B

In a Bipolar Junction Transistor (BJT):
The emitter current \(I_E\) represents the total current exiting the emitter.
This current consists of the collector current \(I_C\) and the base current \(I_B\).
As per Kirchhoff's Current Law (KCL): \(I_E = I_C + I_B\).
Typically, \(I_B\) is significantly smaller than \(I_C\), leading to \(I_E\) being approximately equal to \(I_C\).