power gain(dB)= 10log P output/ P input But instead of 10 log you wrote 20 why please Thank you 9:45◄ SafariStep2b)Solution,Output power,Po= Vo² = (7.8)2 = 7.605w.Ro8Input power,Pi= v₁² = (gox103) eRi10 x 103Pi= 8.1 x 107 wattPowergain =PoPi=7.605Q8.1x/0-7=9388888.889Power gainPower gain (dB) = 20log (93888888)Power gain = 139.452dB(dB)LTE 954?vxDO 9:45◄ Safari←✓ ANSWEREDSaturday, Jun 18, 2022ENGINEERING ELECTRICAL-ENGINEERINGA power amplifier has an input of 90mV across 10K ohm.The outputis 7.8V across an 8 ohm speaker. What is thepower gain in dB?Expert AnswerStep1a)Power gain Ap= Output power: fInput power = PiPower gain (dB) = 20 log (PPT)Power = √²v²R.llLTE 954Q@√xDO

Given, At input side: Input voltage (Vi) = 90mV Resistance (Ri) = 10 k ohm At output side: Output…

Answered: A power amplifier has an input of 90mV…

A power amplifier has an input of 90mV across 10K ohm. The outputis 7.8V across an 8 ohm speaker. What is the power gain in dB?

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter6: Power Flows

Section: Chapter Questions

Problem 6.61P

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Concept explainers

Power Amplifier

The power amplifier is an electronic amplifier designed to maximize the signal strength of a given input. The input signal strength is enhanced to a high enough level to drive output devices such as speakers, headphones, RF (Radio frequency) transmitters, etc. Unlike voltage / current amplifiers, the power amplifier is designed to drive core loads directly and is used as a storage block in the amplifier series.

Maximum Efficiency Criterion

In every field of engineering, there is a tremendous use of the machine and all those machines are equipped for their popular work efficiency so it very much important for operation engineers to monitor the efficiency of the machine, planning engineers to check out the efficiency of the machine before installing the machine and design engineers to design machine for higher efficiency than and then the utility will procure their products that will ultimately lead to profit and loss of the company. It indicates the importance of efficiency right from the initial stage as manufacturing units, intermediate stage as planning coordinators, and end-users stage as a utility.

Question

100%

power gain(dB)= 10log P output/ P input But instead of 10 log you wrote 20 why please Thank you

9:45
◄ Safari
Step2
b)
Solution,
Output power,
Po= Vo² = (7.8)2 = 7.605w.
Ro
8
Input power,
Pi= v₁² = (gox103) e
Ri
10 x 103
Pi= 8.1 x 107 watt
Power
gain =
Po
Pi
=7.605
Q
8.1x/0-7
=9388888.889
Power gain
Power gain (dB) = 20log (93888888)
Power gain = 139.452dB
(dB)
LTE 954
?
vx
DO

9:45
◄ Safari
←
✓ ANSWERED
Saturday, Jun 18, 2022
ENGINEERING ELECTRICAL-ENGINEERING
A power amplifier has an input of 90mV across 10K ohm.
The outputis 7.8V across an 8 ohm speaker. What is the
power gain in dB?
Expert Answer
Step1
a)
Power gain Ap= Output power: f
Input power = Pi
Power gain (dB) = 20 log (PPT)
Power = √²
v²
R
.llLTE 954
Q
@
√x
DO

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