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The nameplate of a 1-phase, 4-pole induction motor gives the following data:
Output 373 W; 230 V
Frequency 50 Hz; Input current 2. 9 A
Power factor 0. 71; Speed 1410 r. p. m.
What is the efficiency of the motor?
  • a)
    65. 3%
  • b)
    78. 7%
  • c)
    89. 2%
  • d)
    70. 6%
Correct answer is option 'B'. Can you explain this answer?
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The nameplate of a 1-phase, 4-pole induction motor gives the following...
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The nameplate of a 1-phase, 4-pole induction motor gives the following...
Given Data:
- Output: 373 W
- Voltage: 230 V
- Frequency: 50 Hz
- Input current: 2.9 A
- Power factor: 0.71
- Speed: 1410 rpm

Efficiency of an Induction Motor:
The efficiency of an induction motor is given by the ratio of output power to input power, multiplied by 100.

Efficiency = (Output Power / Input Power) * 100

Calculating Input Power:
The input power can be calculated using the formula:

Input Power = Voltage * Current * Power Factor

Input Power = 230 V * 2.9 A * 0.71
Input Power = 384.17 W

Calculating Efficiency:
Efficiency = (Output Power / Input Power) * 100
Efficiency = (373 W / 384.17 W) * 100
Efficiency = 97.1%

Answer:
The efficiency of the motor is 97.1%.
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The nameplate of a 1-phase, 4-pole induction motor gives the following...
70.6%
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The nameplate of a 1-phase, 4-pole induction motor gives the following data:Output 373 W; 230 VFrequency 50 Hz; Input current 2. 9 APower factor 0. 71; Speed 1410 r. p. m.What is the efficiency of the motor?a)65. 3%b)78. 7%c)89. 2%d)70. 6%Correct answer is option 'B'. Can you explain this answer?
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