A current carrying wire is wrapped round one side of a transformer, another wire is wrapped round the other. There will be the same amount of power on both sides, but one will have a higher voltage and lower current the other a lower voltage and a higher current.
The transformer is made of iron, this is because it is a soft metal and can be turned on and off as a magnet: the current from the first wire induces a magnetic field in the transformer, this then induces a current in the second wire.
More coils causes more higher voltage (and lower current.) So if the second side has more turns of wire wrapped round the transformer it will step the voltage up (step up transformer.) If the second side has less turns, the voltage will be stepped down (step down transformer.)
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| scicenceaid |
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ReplyDeleteMistake in the final paragraph; you initially had it correct that, 'More coils causes more higher voltage (and lower current,)' however you go on to contradict, 'if the second side has more turns of wire wrapped round the transformer it will step the current up.' You state the current both increases and decreases, when there are more secondary coils than primary. Simply change the word 'current' in the second sentence of that paragraph to 'voltage' and I believe it makes sense.
ReplyDeleteThank you!
DeleteIt's the little mistakes that are deadly because they confuse so easliy
To add to that AC current through primary coil causes an alternating magnetic field in the primary coil the soft iron core strengthens the magnetic field which then interacts with the secondary coil which induces an EMF in the secondary coil
ReplyDeleteLove your blogs Hannah, just one tiny problem, instead of 'More turns', it's been changed to 'Amount of turns in the coil'
ReplyDeleteTransformers are used widely across the globe for a variety of different purposes. They are used personally at homes, or are used by government and industries in many different areas. Electrical engineering students also use small types of transformers for educational purposes.
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