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A Motor Produces an Output of 1.2kW When the Input Is 14kW; Its Efficiency Is: 85.7% 75.7% 65.7% 55.7%

Question

A motor produces an output of 1.2kW when the input is 14kW; its efficiency is: 85.7% 75.7% 65.7% 55.7%

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4.4 (240 Votes)
Verificación de expertos
David Professional · Tutor for 6 years

Answer

Applying the above steps:Efficiency quotient = \( \left( \frac{1.2}{1.4} \right) \times 100\%=85.7 \% \)So the motor has an efficiency of

Explanation

## Step1: Understanding the basics of motor efficiency calculation, the efficiency of a motor is calculated as the ratio of the output power to the input power and it is usually expressed as a percentage.## Step2: Using the formula for efficiency, transformation of the given values is required to perform calculations effectively.### Efficiency Formula: \(\mathbf{Efficiency} = \left( \frac{\mathbf{Output power}}{\mathbf{Input power}} \right) \times 100\% \)## Step3: Substituting the given data into the formula for efficiency. Here, Output power = , Input power = .