IGCSE Physics- Dynamos and Transformers

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1. In a TRANSFORMER an alternating _______ is applied to the primary coil. This causes an alternating magnetic field to be set up in the core. Because the secondary coil is within the magnetic field it induces an alternating _______. What is the missing word

  • voltage
  • current
  • charge
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Other questions in this quiz

2. Which of these is NOT a way to increase the induced voltage in a GENERATOR?

  • turning the magnet/coil faster
  • having more turns and an iron core in the coil
  • increase the current through the wires
  • using a magnet with a stronger magnetic field

3. Because the induced current switches direction every half turn in a GENERATOR, what type of current is produced?

  • Alternating current
  • Direct current
  • both

4. A bicycle dynamo is an example of

  • a generator
  • a motor
  • a magnet

5. Generators induce a current by

  • Either
  • spinning a coil of wire inside a magnetic field
  • spinning a magnet inside a coil of wire


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