Question

When is a transformer said to be ideal?

Answer 1

when its optimus prime ?

Answer 2

An ideal transformer is just one that is 100% efficient and so the voltages in the two windings have the same ratio as the number of turns in them. Transformers are in real life very efficient - frequently 98% efficient or more - and so this 100% approximation is quite widely used. Larger transformers tend to be more efficient than smaller ones.

Answer 3

Yes, the idea is that if the power input to the primary winding is the same as the power output from the secondary winding, the transformer is ideal.

Answer 4

A transformer free of any kind of power loses is said to be ideal