Physics 0625 · IGCSE · Electromagnetic effects

Electromagnetic effects — practice question

A.c. generator includes a coil that turns at 4500 revolutions per minute. What is the frequency of the alternating current?

  • A$1.25\ \text{Hz}$
  • B$75\ \text{Hz}$
  • C$150\ \text{Hz}$
  • D$4500\ \text{Hz}$

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