EASY

Earn 100

What is the current amplification factor in CE configuration?

Important Questions on Transistors

MEDIUM

Physics>Modern Physics>Transistors>Transistor Parameters and Their Relations

In a common emitter configuration with suitable bias, it is given that

R_{L}

is the load resistance and

R_{B E}

is small-signal dynamic resistance (input side). Then, voltage gain, current gain and power gain are given, respectively, by:

β

is current gain,

I_{B}

I_{C}

and

I_{E}

are respectively base, collector, and emitter currents.

MEDIUM

Physics>Modern Physics>Transistors>Transistor Parameters and Their Relations

The current gain of the transistor in common base mode is

0.9

. Its value in common emitter mode is

EASY

Physics>Modern Physics>Transistors>Transistor Parameters and Their Relations

Given below are two statements:

Statement I : $p - n$ junction diodes can be used to function as a transistor, simply by connecting two diodes, back to back, which acts as the base terminal

Statement II: In the study of transistors, the amplification factor $β$ indicates ratio of the collector current to the base current.

In the light of the above statements, choose the correct answer from the options given below.

HARD

Physics>Modern Physics>Transistors>Transistor Parameters and Their Relations

In the circuit shown in the figure, the input voltage

V_{i} is 20 V, V_{B E} = 0 and V_{C E} = 0

. The values of

I_{B}, I_{C} and β

are given by

Question Image

MEDIUM

Physics>Modern Physics>Transistors>Transistor Parameters and Their Relations

The current gain of a common emitter amplifier is

69

. If the emitter current is

7.0 mA

, collector current is :

EASY

Physics>Modern Physics>Transistors>Transistor Parameters and Their Relations

Let

i_{e}, i_{c}

and

i_{b}

represent emitter current, collector current and the base current of a transistor, then

EASY

Physics>Modern Physics>Transistors>Transistor Parameters and Their Relations

If an emitter current is changed by

4 mA

, the collector current changes by

3.5 mA

. The value of

β

will be:

MEDIUM

Physics>Modern Physics>Transistors>Transistor Parameters and Their Relations

For common emitter transistor amplifier, the audio signal voltage across the collector resistance of

2 k Ω

4 V.

If the current amplification factor of the transistor is

100

and the base resistance is

1 k Ω

then the input signal voltage is

EASY

Physics>Modern Physics>Transistors>Transistor Parameters and Their Relations

In the study of transistor as an amplifier, the ratio of collector current to emitter current is

0.98

then the ratio of collector current to base current will be

EASY

Physics>Modern Physics>Transistors>Transistor Parameters and Their Relations

In a transistor circuit, the collector current is changed by

89 mA

, if the emitter current is changed to

9.0 mA

. The value of current amplification factor,

β

EASY

Physics>Modern Physics>Transistors>Transistor Parameters and Their Relations

For a transistor,

α_{d c}

and

β_{d c}

are the current ratios, then the value of

\frac{β_{d c} - α_{d c}}{α_{d c} \cdot β_{d c}}

MEDIUM

Physics>Modern Physics>Transistors>Transistor Parameters and Their Relations

A NPN transistor is connected in common emitter configuration in a given amplifier. A load resistance of

800 Ω

is connected in the collector circuit and the voltage drop across it is

0 .8

V

. If the current amplification factor is

0.96

and the input resistance of the circuit is

192 Ω

, the voltage gain and the power gain of the amplifier will respectively be:

EASY

Physics>Modern Physics>Transistors>Transistor Parameters and Their Relations

What is a common base amplifier?

MEDIUM

Physics>Modern Physics>Transistors>Transistor Parameters and Their Relations

A p-n-p transistor in common base configuration offers an input resistance of

50 Ω

. If the current gain of the amplifier is

0.96

, load resistance in the circuit is

5 KΩ

, find (a) voltage gain

EASY

Physics>Modern Physics>Transistors>Transistor Parameters and Their Relations

How the current amplification factor of CC configuration is related to that of CE configuration?

MEDIUM

Physics>Modern Physics>Transistors>Transistor Parameters and Their Relations

What is power gain in amplifier?

EASY

Physics>Modern Physics>Transistors>Transistor Parameters and Their Relations

For a transistor

α

= 0.95

, then the value of

γ

0.05

EASY

Physics>Modern Physics>Transistors>Transistor Parameters and Their Relations

Correct the following sentence: The relation between transistor constants $β$ and $γ$ is $γ = 1 - β$ .

MEDIUM

Physics>Modern Physics>Transistors>Transistor Parameters and Their Relations

How the current amplification factor of CC configuration is related to that of CE configuration?

EASY

Physics>Modern Physics>Transistors>Transistor Parameters and Their Relations

What is a common base amplifier?

What is the current amplification factor in CE configuration?

Important Questions on Transistors

Learn and Prepare for any exam you want !