amilessmith8gq
amilessmith8gq amilessmith8gq
  • 19-01-2021
  • Physics
contestada

If a 0.75 efficient motor produces 150 W of useful power, what was the input power? *

Respuesta :

elcharly64
elcharly64 elcharly64
  • 19-01-2021

Answer:

The input power is 200 W

Explanation:

Motor Efficiency

The efficiency of a motor can be calculated as follows:

[tex]\displaystyle \beta=\frac{P_o}{P_i}[/tex]

Where:

β   = efficiency

Po = Output power

Pi  = Input power

Solving for Pi:

[tex]\displaystyle P_i=\frac{P_o}{\beta}[/tex]

The efficiency is β=0.75 and the output power is Po=150 W, thus the input power is:

[tex]\displaystyle P_i=\frac{150}{0.75}[/tex]

[tex]P_i=200 \ W[/tex]

The input power is 200 W

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