Other questions in this quiz

2. If a transformer is a STEP-UP transformer, the primary coil will have ____ turns than the secondary coil

  • the same amount
  • less
  • more

3. A voltage is produced when

  • a soft iron bar moves in a coil of wire
  • a magnet moves in a coil of wire
  • a magnet touches a coil of wire

4. Why do the national grid use transformers to REDUCE THE CURRENT?

  • When a large current flows through a wire it reduces the speed of transfer of electricity
  • When a large current flows through a wire lots of energy is lost as heat
  • Large currents cost a lot of money to create

5. A bicycle dynamo is an example of

  • a magnet
  • a generator
  • a motor

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