# Chapter 25 - Think and Solve: 40

Input current = 0.36 A.

#### Work Step by Step

Electric power is the same in both the primary and secondary coils. Power is the product of current, I, and voltage, V. $$(I \times V)_{primary}= (I \times V)_{secondary}$$ $$(I)(120 V)= (1.8 A)(24 V)$$ Solve for the input current of 0.36 A.

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