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The frequency of voltage generated by an alternator having 4 poles and rotating at 750 rpm is

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  1. 16 2/3 Hz
  2. 25 Hz
  3. 60 Hz
  4. 50 Hz

Answer (Detailed Solution Below)

Option 2 : 25 Hz
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Detailed Solution

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The correct answer is option 2): 25 Hz

Concept:

The frequency of voltage generated by an alternator  given by

f = frequency in Hz,

P = No. of pole,

N = speed in RPM

Calculation:

Given

P = 4

N = 750 rpm

 

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