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Class 12 Physics Chapter 14 Semiconductor Devices Transistor amplifier Malayalam
For Notes & Previous Year Question Paper check ecstudynote.bl...
Introduction to semiconductor Part 1 • #1. Plus Two Physics C...
Types of semiconductors Part 2 • #2. Types Of Semicondu...
PN Junction Diode Part 3 • #3. PN Junction Diode|...
Rectifier fullwave/ halfwave Part 4 • #4 Rectifier | Full-wa...
zener diode avalanche breakdown & zener breakdown Part 5 • #5. Zener Diode As Vol...
zener diode as voltage regulator Part 6 • #6. Zener Diode as vol...
Photodiode Part 7 • #7. Photodiode ||Worki...
Solar cell Part 8 • #8. Solar cell working...
LED light Emitting Diode Part 9 • #9. Light Emitting Dio...
Transistor Part 10 • #10. Transistor Workin...
Input characteristics of transistor Part 11 • #11. Input Characteris...
Output characteristics of transistor Part 12 • #12. Output Characteri...
Transistor As An amplifier Part 13 • #13. Transistor as an ...
Transistor As a switch Part 14 • #14. Transistor as a S...
Transistor As An oscillator Part 15 • #15. Transistor As An ...
Energy band theory of solids Part 16 • #16. Energy Band Theor...
A transistor acts as an amplifier by raising the strength of a weak signal. The DC bias voltage applied to the emitter base junction, makes it remain in forward biased condition. This forward bias is maintained regardless of the polarity of the signal.
The low resistance in input circuit, lets any small change in input signal to result in an appreciable change in the output. The emitter current caused by the input signal contributes the collector current, which when flows through the load resistor RL, results in a large voltage drop across it. Thus a small input voltage results in a large output voltage, which shows that the transistor works as an amplifier.
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