Transistors

Step 1: Understanding the Voltage Gain Formula
For a transistor in a common emitter (CE) configuration, the voltage gain ( ) is given by: The voltage gain in CE configuration is expressed as: where: - is the resistance in the collector circuit,
- is the resistance in the base circuit,
- is the current gain of the transistor.
Step 2: Verifying the Correct Option From the formula: Comparing with the given options, the correct answer is Option (4): .
Final Answer: The voltage gain of a transistor amplifier in CE configuration is , which matches option (4).

Step 1: The voltage gain of a transistor in a common emitter configuration is given by:
Step 2: Given:
Step 3: Compute voltage gain:
Step 4: Compute output voltage: