Kcl Kvl In Ac Circuits

Transformation Ratio ( ):

The transformation ratio of a transformer is the ratio of the secondary voltage ( ) to the primary voltage ( ). It is given by the formula:

Given Data:

(i) Calculation of Transformation Ratio ( ):

(ii) Calculation of Number of Turns in the Secondary Coil ( ):

Using the turns ratio formula:

(iii) Calculation of Input Power ( ):

The efficiency of a transformer is given by:

Final Answers:

• (i) Transformation ratio ( ) =
• (ii) Number of turns in the secondary coil ( ) =
• (iii) Input power ( ) = kW

Lenz’s law states that the direction of the induced current is such that it opposes the change in magnetic flux that produced it.
When the magnetic flux linked with a circuit changes, an electromotive force (EMF) is induced, and the induced current opposes this change.