Junction Transistor

IMPORTANT

Junction Transistor: Overview

This Topic covers sub-topics such as Symbol of a Transistor, Common Emitter Configuration, Transistor Biasing, Working of Transistor, Common Base Configuration, Junction Transistor and, Input Characteristics of Transistor

Important Questions on Junction Transistor

EASY
IMPORTANT

Choose the correct expression for the current gain in npn transistor in CE configuration:

EASY
IMPORTANT

Choose the correct expression for the current gain in npn transistor in CE configuration:

MEDIUM
IMPORTANT

If Iε is the emitter current, IB the base current and IC the collector current of a transistor, then which of the following statements are NOT TRUE?

(i) IEIBIC

(ii) IB<<IEIC

(iii) IC<<IEIB

(iv) IE<ICIB

EASY
IMPORTANT

The characteristics of an n-p-n transistor in common emitter configuration is shown in the figure below. IB is the base current, IC is the collector current and VCE is the voltage at the collector with respect to the emitter. From the data shown here we may conclude

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EASY
IMPORTANT

For a transistor in common emitter configuration, the emitter current is 1 mA and the base current is 25 μA. The βdc of the transistor is

EASY
IMPORTANT

The correct relationship between two current gains in a transistor is (where symbols have usual meanings)

EASY
IMPORTANT

The collector current is 10 mA in n-p-n transistor. If 80% electrons emitted reach the collector then:

EASY
IMPORTANT

Find the value of the resistor Rb, if the base current in the transistor circuit shown in the figure is 35 μA.

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EASY
IMPORTANT

Consider a common-base amplifier made by a PNP transistor, the current gain is 0.96 and emitter current is 7.2 mA. The base current is:

HARD
IMPORTANT

Read the following diagram and tell which of the following statements are true:-

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HARD
IMPORTANT

The figure shows that transfer characteristics of a base biased common emitter transistor. Which of the following statements are not true for the configuration?

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EASY
IMPORTANT

The collector current Ic that is obtained in a self biased transistor is _____

EASY
IMPORTANT

A certain npn transistor has a forward current gain β of 99. The current amplification factor α of the transistor is

EASY
IMPORTANT

The relationship between current gain α in Common Base [CB] mode and current gain β in Common Emitter [CE] mode is

HARD
IMPORTANT

A transistor having α=0.99 and VBE=0.7 V, is given in the circuit. Find the value of the collector current.

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EASY
IMPORTANT

________ segment supplies the majority charge carriers for the current flow through a transistor

MEDIUM
IMPORTANT

The base region in a p-n-p transistor is obtained by doping an intrinsic semiconductor with

EASY
IMPORTANT

The moderate sized and heavily doped region of a transistor is

HARD
IMPORTANT

What will be the current gain in the common emitter amplifier if IC =0.9 mA, Ib = 11.25 μA?

MEDIUM
IMPORTANT

In an NPN transistor circuit, the collector current is 10mA. If 90% of the emitted electrons reach the collector, the emitter current IE and base current IB are given by