Question
Download Solution PDFA power amplifier delivers 25 W of ac power to a 4 Ω speaker load. If the dc input power is 40 W, what is the efficiency of this amplifier?
This question was previously asked in
KVS TGT WET (Work Experience Teacher) 23 Dec 2018 Official Paper
Answer (Detailed Solution Below)
Option 3 : 62.5%
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KVS TGT Mathematics Mini Mock Test
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Detailed Solution
Download Solution PDFConcept:
The efficiency of the power amplifier is given by;
Where;
η = Efficiency
P0 = Output AC power
Pi = Input DC power
Calculation:
Given;
P0 = Output AC power =25 W
Pi = Input DC power = 40 W
Then;
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