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for long transmission line, the voltages are in the range between 155,000 to 765,000 volts and by the time it gets to your neighborhood, it has been stepped down to 7,200 volts. what is the turn ratio of the transformer to step down from 7,200 volts to 240 volts at your house? a. 30 b. 0.033 c. 0.017 d. 60

Sagot :

15kW the turn ratio of the transformer to step down from 7,200 volts to 240 volts at your house.

The act of transmitting anything from one location to another, such as a disease spreading from one person to another or a radio or TV broadcast, is known as transmission.

Now, V p

=11000V, V s

=220V, N p

=6000,

=60%,

P 0 =9kW

=910 3 W

Efficiency is equal to input power output = P i.

​P \s0 \s​

∴p \si \s​ \s = \sη \sP \s0 \s​

​ \s = \s60/100 \s9×10 \s3

\s =1.5×10 \s4 \s

=15kW

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