Physics, 28.11.2019 22:31 rayanne7099
The power supply for your answering machine is a small black cube that plugs directly into an electric outlet. the main component in this supply is a transformer and a moderate current from the 120-volt power line flows through the primary coil of this transformer. if the transformer’s primary coil has 20 times as many turns of wire in it as the secondary coil has, then the secondary coil provides: (a) a large voltage rise for the large amount of current that flows through it. (b) a small voltage rise for the large amount of current that flows through it. (c) a small voltage rise for the small amount of current that flows through it. (d) a large voltage rise for the small amount of current that flows through it.
Answers: 2
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