The Resistance of the Primary Coil of a Well-Designed, 1:10 $\Omega$

question 49

Multiple Choice

The resistance of the primary coil of a well-designed, 1:10 step-down transformer is 1 $\Omega$ .With the secondary circuit open, the primary is connected to a 12 V ac generator.The primary current is:

• A)essentially zero
• B)about 12 A
• C)about 120 A
• D)depends on the actual number of turns in the primary coil
• E)depends on the core material

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