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If R is the resistance of secondary winding of an electrical transformer and K is the transformation ratio then the equivalent secondary resistance referred to primary will be _________

If R is the resistance of secondary winding of an electrical transformer and K is the transformation ratio then the equivalent secondary resistance referred to primary will be _________ Correct Answer R/K2

Resistances or more precisely impedances are transformed in the ratio of inverse square of the transformation ratio or turns ratio. Thus, primary to secondary resistance is equal to reciprocal of square of turns ratio.

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