Q1.Show that in an ideal transformer when the voltage is stepped up by certain factor the current get stepped down by the same factor.

Hello,

We know that for ideal transformer power is constant that means

 VI = constant =k

If V is increased 2V. Let corresponding change in current is I'.

Then  2V I' = k

 => 2V I' = VI

 =>  I' = I/2 

Hence when the voltage is stepped up by certain factor the current get stepped down by the same factor.

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