Physics 0625 · IGCSE · Electromagnetic effects

Electromagnetic effects — practice question

A transformer is required to change a supply of $240\ \text{V a.c.}$ to $4800\ \text{V a.c.}$. Which pair of coils would be appropriate for use in this transformer?

  • A$N_p = 50,\ N_s = 1000$
  • B$N_p = 240,\ N_s = 48\,000$
  • C$N_p = 480,\ N_s = 24$
  • D$N_p = 2000,\ N_s = 100$

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