linear transformer circuit analysis

A linear transformer may also be regarded as one whose flux is proportional to the currents in its windings.
The coil connected to the load is called the secondary winding. The resistances R1 and R2 are included to account for the losses (power dissipation) in the coils.

The transformer is said to be linear if the coils are wound on a magnetically linear material—a material for which the magnetic permeability is constant.

Such materials include air, plastic, Bakelite, and wood. In fact, most materials are magnetically linear.

Linear transformers are sometimes called air-core transformers, although not all of them are necessarily air-core.

They are used in radio and TV sets.
A transformer is generally a four-terminal device comprising two (or more) magnetically coupled coils.

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