Suppose there are two transformers between your house and the high-voltage transmission line that distributes the power. In addition, assume your house is the only one using electric power. At a substation the primary of a step-down transformer (turns ratio = 1:23) receives the voltage from the high-voltage transmission line. Because of your usage, a current of 51.1 mA exists in the primary of the transformer. The secondary is connected to the primary of another step-down transformer (turns ratio = 1:36) somewhere near your house, perhaps up on a telephone pole. The secondary of this transformer delivers a 240-V emf to your house. How much power is your house using? Remember that the current and voltage given in this problem are rms values.
Suppose there are two transformers between your house and the high-voltage transmission line that distributes the power. In addition, assume your house is the only one using electric power. At a substation the primary of a step-down transformer (turns ratio = 1:23) receives the voltage from the high-voltage transmission line. Because of your usage, a current of 51.1 mA exists in the primary of the transformer. The secondary is connected to the primary of another step-down transformer (turns ratio = 1:36) somewhere near your house, perhaps up on a telephone pole. The secondary of this transformer delivers a 240-V emf to your house. How much power is your house using? Remember that the current and voltage given in this problem are rms values.
Chapter15: Alternating-current Circuits
Section: Chapter Questions
Problem 15.9CYU: Check Your Understanding A transformer steps the line voltage down from 110 to 9.0 V so that a...
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Transcribed Image Text:Suppose there are two transformers between your house and the high-voltage transmission line
that distributes the power. In addition, assume your house is the only one using electric power. At
a substation the primary of a step-down transformer (turns ratio = 1:23) receives the voltage
from the high-voltage transmission line. Because of your usage, a current of 51.1 mA exists in the
primary of the transformer. The secondary is connected to the primary of another step-down
transformer (turns ratio = 1:36) somewhere near your house, perhaps up on a telephone pole.
The secondary of this transformer delivers a 240-V emf to your house. How much power is your
house using? Remember that the current and voltage given in this problem are rms values.
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