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The power output of an amplifier is 7 watts. The power gain is 80. What is the input power?(a) 87.5mW(b) 87.5W(c) 13W(d) 13mWThis question was posed to me in final exam.Question is taken from Gain, Attenuation & Decibels topic in portion Fundamentals of Electronics of Avionics |
Answer» RIGHT CHOICE is (a) 87.5mW The EXPLANATION is: GAIN = POWER out / power in Power in = power out / gain = 7/80 = 87.5mW. |
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