A. Infinite
B. 100 ohm
C. Zero
D. 1000 ohm
Answer: A
B. 100 ohm
C. Zero
D. 1000 ohm
Answer: A
Explanation:
- In a transformer the coils are not electrically connected therefore the resistance is ideally infinite. But an autotransformer does the same using a single coil as primary with one or more taps for secondary in different parts of the coil. In this case the resistance will ideally be ZERO, or a short-circuit if you will.
- Since the primary and secondary windings are not connected to each other, one can say there exists the resistance of infinite ohms. These windings are connected to each other magnetically not electrically.
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