For a CE transister amplifier, the audio signal voltage...

For a CE transister amplifier, the audio signal voltage across the collector resistance of $2 \mathrm{k} \Omega$ is $2 \mathrm{~V}$ Suppose the current amplification factor of the transistor is $100 .$ Find the input signal voltage and base current. If the base resistance is $1 \mathrm{k} \Omega$. [NCERT] (a) $0.01 \mathrm{~V}$ and $10 \mu \mathrm{A}$ (b) $0.1 \mathrm{~V}$ and $14 \mu \mathrm{A}$ (c) $0.001 \mathrm{~V}$ and $100 \mu \mathrm{A}$ (d) $2.0 \mathrm{~V}$ and $10 \mu \mathrm{A}$

For a CE transister amplifier, the audio signal voltage across the collector resistance of $2 \mathrm{k} \Omega$ is $2 \mathrm{~V}$ Suppose the current amplification factor of the transistor is $100 .$ Find the input signal voltage and base current. If the base resistance is $1 \mathrm{k} \Omega$. [NCERT]
(a) $0.01 \mathrm{~V}$ and $10 \mu \mathrm{A}$
(b) $0.1 \mathrm{~V}$ and $14 \mu \mathrm{A}$
(c) $0.001 \mathrm{~V}$ and $100 \mu \mathrm{A}$
(d) $2.0 \mathrm{~V}$ and $10 \mu \mathrm{A}$

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Key Concepts

Input Signal Voltage and Base Resistance

The base resistance is used to determine the input signal voltage in the amplifier circuit. Through Ohm’s law, the voltage drop across this resistance is directly related to the base current, thereby linking the small input current to the observable input voltage.

Collector Resistance and Signal Voltage

In a common emitter amplifier, the collector resistance plays a crucial role by converting the amplified collector current into a voltage signal. The voltage developed across this resistor, governed by Ohm's law, represents the amplified output signal of the circuit.

Common Emitter Transistor Amplifier

A common emitter (CE) amplifier is a transistor configuration where the emitter terminal is common to both the input and output circuits. It is popular due to its ability to provide substantial amplification of both voltage and current, making it suitable for many analog signal processing applications.

Transistor Current Gain (?)

The current gain, often denoted by ?, is the ratio of the change in collector current to the change in base current in a transistor. It essentially quantifies how effectively a transistor can amplify a small input current to produce a larger output current.

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