IGCSE Physics- Dynamos and Transformers

HideShow resource information

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

  • charge
  • voltage
  • current
1 of 15

Other questions in this quiz

2. Is mains electricity AC or DC?

  • depends on the type of generator it was produced in
  • AC
  • DC

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

5. Generators induce a current by

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

Comments

No comments have yet been made

Similar Physics resources:

See all Physics resources »See all Electricity resources »