Physics 0625 · IGCSE · Electromagnetic effects

Electromagnetic effects — practice question

A transformer contains $N_p$ turns in its primary coil and $N_s$ turns in its secondary coil. The potential difference across the primary coil is $V_p$, and the potential difference across the secondary coil is $V_s$. How are these four quantities connected?

  • A$V_p \times V_s = N_p \times N_s$
  • B$\frac{V_p}{V_s} = \frac{N_p}{N_s}$
  • C$\frac{V_p}{V_s} = \frac{N_s}{N_p}$
  • D$\frac{V_p}{V_s} = N_p \times N_s$

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