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Physics · Oct / Nov 2017 · Paper 12 · Question 33

5054The d.c. motor

Why is the coil of an electric motor wound on a soft-iron cylinder?

  1. Ato decrease the electric current
  2. Bto increase the electric current
  3. Cto reverse the magnetic field
  4. Dto strengthen the magnetic field

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Correct answer: D. to strengthen the magnetic field

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