Question: In a BJT, what does the term \'beta\' (β) refer to?
Options:
The current gain
The voltage drop
The frequency response
The thermal resistance
Correct Answer: The current gain
Solution:
Beta (β) is the current gain of a Bipolar Junction Transistor (BJT), defined as the ratio of collector current to base current.
In a BJT, what does the term 'beta' (β) refer to?
Practice Questions
Q1
In a BJT, what does the term 'beta' (β) refer to?
The current gain
The voltage drop
The frequency response
The thermal resistance
Questions & Step-by-Step Solutions
In a BJT, what does the term 'beta' (β) refer to?
Step 1: Understand what a BJT is. A BJT (Bipolar Junction Transistor) is a type of electronic device used to amplify or switch electronic signals.
Step 2: Identify the three main parts of a BJT: the emitter, the base, and the collector.
Step 3: Know that the base current (Ib) is the small current that controls the larger current flowing from the collector to the emitter.
Step 4: Recognize that the collector current (Ic) is the larger current that flows through the collector.
Step 5: Learn the definition of beta (β): it is the ratio of the collector current (Ic) to the base current (Ib).
Step 6: Write the formula for beta (β): β = Ic / Ib.
Step 7: Understand that a higher beta value means the transistor can amplify the base current more effectively.
Current Gain – Beta (β) represents the amplification factor of a BJT, indicating how much the collector current is amplified relative to the base current.
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