What happens to the collector current (Ic) when the base current (Ib) increases in a BJT operating in the active region?
Question
What happens to the collector current (Ic) when the base current (Ib) increases in a BJT operating in the active region?
Solution
In a Bipolar Junction Transistor (BJT) operating in the active region, the collector current (Ic) is directly proportional to the base current (Ib). This is due to the transistor's current gain, also known as beta (β), which is the ratio of the collector current to the base current.
Here are the steps to understand what happens to the collector current (Ic) when the base current (Ib) increases:
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The base current (Ib) controls the number of electrons that can cross from the emitter to the collector.
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When the base current (Ib) increases, more electrons are able to cross from the emitter to the collector.
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This increase in electron flow results in an increase in the collector current (Ic).
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Therefore, when the base current (Ib) increases, the collector current (Ic) also increases, assuming the transistor is operating in the active region.
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The exact increase in collector current (Ic) for a given increase in base current (Ib) depends on the transistor's current gain (β). If the current gain is high, a small increase in base current can cause a large increase in collector current.
In conclusion, in a BJT operating in the active region, an increase in the base current (Ib) will result in an increase in the collector current (Ic).
Similar Questions
An npn bipolar junction transistor (BJT) is operating in the active region. If the reverse bias across the base-collector junction is increased, thenThe effective base-width increases and common-emitter current gain decreasesThe effective base-width increases and common-emitter current gain increases The effective base-width decreases and common-emitter current gain decreasesThe effective base-width decreases and common-emitter current gain increases
Once in saturation, a further increase in base current will(a) Cause the collector current to increase(b) Not affect the collector current(c) Turn the transistor off
A BJT is said to be operating in the saturation region ifBase-emitter junction is reverse biased and base-collector junction is forward biasedBoth the junctions are reverse biasedBoth the junctions are forward biasedBase-emitter junction is forward biased and base-collector junction is reverse biased
In an npn transistor circuit, the collector current is 8 mA. If 90% of the electrons emitted reach the collector, the emitter current (IE) and base current (IB) are given bySelect one:a. IE = – 8 mA, IB = 9 mAb. IE = 9 mA, IB = – 8 mAc. IE = 1 mA, IB = 9 mAd. IE = 9 mA, IB = 1 mA
A BJT is said to be operating in the saturation region if
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