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The electromotive force obtained from a simple dynamo may be increased by

Physics
JAMB 1984

The electromotive force obtained from a simple dynamo may be increased by

  • A. increasing the cross-sectional area of the coil
  • B. winding the coil on a soft-iron armature so as to decrease the magnetic flux through the coil
  • C. increasing the speed of rotation
  • D. making the field magnet longer
  • E. using low-resistance copper coils
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Correct Answer: Option C
Explanation

Increasing the rotation speed enhances the electromotive force (EMF) generated due to Faraday's law of electromagnetic induction.

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