Transformer
Transformer is a
device that change the alternate current voltage with out effecting the
parameters like its frequency.If the output voltage is less than the input
voltage of the transformer, then the transformer is called a step down transformer
and if the output voltage is more than the input voltage then the transformer
is called step up transformer.
Transformer works
basing on the mutual induction concept. If there is a change in the current in
one coil, there is a change in the magnetic flux and induced EMF is developed
in the other coil.
The apparatus
consists of two copper wound coils with soft iron core as the base. This soft
iron Martial helps in managing the loss of eddy currents.
We can identify the
magnitude of the induced EMF using the definition as shown below.
We can measure the
efficiency of the transformer as the ratio of output voltage developed to the
input voltage and it depends on the number of the turns that the coil has. We
can explain and derive a small formula as shown in the diagram below.
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