In a n ·p-n transistor circuit, the collector current is 10 mA. If 95 per cent of the electrons

step 1 So here collector current equals 10 millie ampere and collector current equal 95 by 100 emitter

In a n ·p-n transistor circuit, the collector current is 10...

In a $n \cdot p-n$ transistor circuit, the collector current is $10 \mathrm{~mA}$. If 95 per cent of the electrons emitted reach the collector, which of the following statements are true? (a) The emitter current will be $8 \mathrm{~mA}$ (b) The emitter current will be $10.53 \mathrm{~mA}$ (c) The base current will be $0.53 \mathrm{~mA}$ (d) The base current will be $2 \mathrm{~mA}$

In a $n \cdot p-n$ transistor circuit, the collector current is $10 \mathrm{~mA}$. If 95 per cent of the electrons emitted reach the collector, which of the following statements are true?
(a) The emitter current will be $8 \mathrm{~mA}$
(b) The emitter current will be $10.53 \mathrm{~mA}$
(c) The base current will be $0.53 \mathrm{~mA}$
(d) The base current will be $2 \mathrm{~mA}$

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Key Concepts

Transistor Current Relationships

In bipolar junction transistors, the emitter current (I_E) is the sum of the collector current (I_C) and the base current (I_B). This fundamental principle (I_E = I_C + I_B) is essential for analyzing current distribution in transistor circuits.

Emitter Injection Efficiency

Emitter injection efficiency describes the fraction of injected charge carriers from the emitter that successfully reach the collector. A high efficiency implies that most carriers contribute to the collector current, allowing for accurate computation of the emitter current when the collector current is known.

Percentage-Based Current Calculations

When a percentage of the emitted carriers reach the collector, it becomes possible to determine the overall emitter current by dividing the collector current by the collection efficiency (expressed as a decimal). This calculation is crucial for assessing both the emitter current and the resulting base current through the difference between emitter and collector currents.

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