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Transformers - Engineering

Q1:

A transformer has a 1:6 turns ratio and a secondary coil load resistance of 470 . The load resistance as seen by the source is

A 1.3 

B 7.8 

C 78 

D 13 

ANS:D - 13 

As we know that R1 = k^2 * R2.
R1 = 670/36 = 13.