# draw a schematic diagram of step up transformer explain its working principle assuming the transformer to be 100% efficient obtain the relation foe i) the current in the secondary in terms of the current in the primary ii) the number of turns in the primary and secondary windings

Below is the diagram of step-up transformer:

Let the alternating current, alternating voltage and the numbe of turns in primary and secondary coils are (I_{1}, I_{2}),(V_{1},V_{2}) and (n_{1}, n_{2}) respectively.

Magnetic flux linked with two coils is proportional to their number of turns. So, if φ_{s} and φ_{p} are the values of magnetic flux linked with primary and secondary coil, then

According to Faraday’s law, induced emf produced is given by

If transformer is 100% efficient, then there is no loss of energy in the process.

Regards

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