I have an equation which is Rac=(a^2)(Rac), can someone tell me where or how to get a^2. This is for a transformer coupled amplifier. Thanks

 

I have an equation which is Rac=(a^2)(Rac), can someone tell me where or how to get a^2. This is for a transformer coupled amplifier. Thanks

Do you mean: Rac=(a^2)(RL) ?

a is the turns ratio for the transformer.