In NPN transistor the collector current is 10 mA. If 90 % of electrons emitted reach the collec

Name: Problem 55, Chapter 20: A Complete Resource Book in Physics for JEE Main
Uploaded: 2021-09-28T17:36:52-08:00
Duration: 1 min 42 s
Channel: Aman Kumar
Description: In NPN transistor the collector current is 10 mA. If 90 % of electrons emitted reach the collector, then (A) emitter current will be 9 mA. (B) emitter current will be 11.1 mA. (C) base current will be 0.1 mA. (D) base current will be 0.01 mA.

step 1 So hello students in this question we have given that we have an amp transistor collector curren

Question

In NPN transistor the collector current is $10 \mathrm{~mA}$. If $90 \%$ of electrons emitted reach the collector, then (A) emitter current will be $9 \mathrm{~mA}$. (B) emitter current will be $11.1 \mathrm{~mA}$. (C) base current will be $0.1 \mathrm{~mA}$. (D) base current will be $0.01 \mathrm{~mA}$.

   In NPN transistor the collector current is $10 \mathrm{~mA}$. If $90 \%$ of electrons emitted reach the collector, then
(A) emitter current will be $9 \mathrm{~mA}$.
(B) emitter current will be $11.1 \mathrm{~mA}$.
(C) base current will be $0.1 \mathrm{~mA}$.
(D) base current will be $0.01 \mathrm{~mA}$.

A Complete Resource Book in Physics for JEE Main

Sanjeev Kumar 1st Edition

Chapter 20, Problem 55

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Solved by Expert Aman Kumar

09/28/2021

Step 1

This implies that the emitter current (Ie) is the total current which is the sum of the collector current and the base current (Ib). Show more…

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In NPN transistor the collector current is $10 \mathrm{~mA}$. If $90 \%$ of electrons emitted reach the collector, then (A) emitter current will be $9 \mathrm{~mA}$. (B) emitter current will be $11.1 \mathrm{~mA}$. (C) base current will be $0.1 \mathrm{~mA}$. (D) base current will be $0.01 \mathrm{~mA}$.

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Key Concepts

Transistor Current Relationships

In bipolar junction transistors (BJTs), the emitter current is the sum of the collector current and the base current. This relationship is fundamental for analyzing transistor operation, as it reflects the conservation of charge in the device and helps in understanding how small base currents can control larger collector currents.

Electron Transport Efficiency

This concept refers to the fraction of charge carriers (electrons, in the case of an NPN transistor) that successfully transit from the emitter to the collector. It is crucial for determining performance parameters such as current amplification, where a high transport efficiency indicates that most of the carriers injected into the device contribute directly to the collector current.

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