How are step-up transformers used in the transmission of electrical energy?

a.

They increase the voltage and the current for a home.

b.

They decrease the voltage before it leaves a power plant.

c.

They increase the voltage for efficient long-distance transmission.

d.

All of the aboveHow are step-up transformers used in the transmission of electrical energy?A: is correct, a step up transformer increases the output voltage and current by stepping up the output from the secondary set of coils in the transformer have more coil turns than the input coil(s) of the primary. This is how it makes the voltage and current increaseHow are step-up transformers used in the transmission of electrical energy?C.



The voltage is "stepped-up" after generation in transmission substations to decrease "I^2 R" losses. If the Voltage is high, than the current (I) will be lower, which decreases losses as the loss is the proportional to the square of the current ... thus the lower the current (i.e. higher the voltage,V=I*R) the more efficient.How are step-up transformers used in the transmission of electrical energy?c.

They increase the voltage for efficient long-distance transmission.