SSE JE Electrical Engineering 28 Oct 2020 Shift 1 Papers

Question : 179 of 200

Marks: +1, -0

An alternator having 20 poles and running at 600 rpm will generate alternating voltage and current whose frequency is:

Solution:

synchronous speed

\N_\s

= 600 rpm.
Number of poles p = 20
Frequency,

\f_\s

= (600 × 20)/120

Frequency,

\f_\s

= 100 Hertz.

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