transformers
- Created by: lukey2804
- Created on: 14-10-20 19:58
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- transformers
- only work on alternating currents
- change the size of the pd of a alternating current
- when an alternating pd is applied to a primary coil it causes the iron to magnetize and demagnetize quickly
- this induces alternating pd in the second coil
- causes the current to be induced
- this induces alternating pd in the second coil
- if you know the input pd and the number of turns in the coil you can calculate the output pd of the transformer
- Vs Is = Vp Ip
- v= pd i=current
- s= secondary p= primary
- transformers are 100 % effective if you assume the input power is equal to the output power
- no of turns in primary coil
- input pd
- can be used either way- can be used upside down
- =
- put what your trying to find on top so there is less rearranging
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