A transformer with 5500 turns in its primary winding is used between a 240V a.c…

Physics WAEC 1994

A transformer with 5500 turns in its primary winding is used between a 240V a.c supply and 120V kettle. Calculate the number of turns in the secondary winding

  • 11000
  • 2750 checkmark
  • 460
  • 550
  • 232

The correct answer is: B

Explanation

\(\frac{E_s}{E_p} = \frac{N_s}{N_p} ; \frac{120}{240}= \frac{N_s}{5500} thus N_s\)=2750
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