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Semiconductors and Semiconductor Devices — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsSemiconductors and Semiconductor Devices2 Marks
Question
Consider an amplifier circuit using a transistdf. The output power is several times greater than the input power. Where does the extra power come from?
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Answer

The amplifier takes this energy from the power supply. Amplifiers take the energy from the power supply and control the output to match with the input signal but with greater amplitude.

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