transformer

• whats the point of a transformer

  -transformers change the potential difference by using the generator effect

  -they only work with alternating current
• whats the two types of transformers

  -step up transformer

  -step down transformer
• what does the step up transformer do

  -increease the potential difference

  -more turns on secondary coil than primary

  -to reduce energy loss
• what does a step down transformer do

  -decrease voltage to230V

  -less turns on secondary coil

  -safe for use
• how does a transformer work?

  -alternating current creates a changing magnetic field around primary coil

  -magnetic field also created in the iron core

  -this induceds a potential difference across the secondary coil
• why is the core made of soft iron

  can be easily magnetised and demagnetised