Question

Read the following paragraph and answer the question:

Long distance power transmissions

The large-scale transmission and distribution of electrical energy over long distances is done with the use of transformers. The voltage output of the generator is stepped up. It is then transmitted over long distances to an area sub-station near the consumers. There the voltage is stepped down. It is further stepped down at distributing sub-stations and utility poles before a power supply of 240 V reaches our homes.

We need to step-up the voltage for power transmission, so that ______.

Options

• the current is reduced and consequently, the I²R loss is cut down.

• the voltage is increased, the power losses are also increased.

• the power is increased before transmission is done.

• the voltage is decreased so V²/R losses are reduced.

Answer 1

We need to step-up the voltage for power transmission, so that the current is reduced and consequently, the I²R loss is cut down.