Unit 1 Topic 3 Question 7

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

Electricity is generated at a . It passes through a transformer to increase the from 25000 V to 275 000 V. The current is . The electricity is then distributed across the National . The reason that the voltage is so high is to reduce the amount of energy by up the wires. If the voltage were low and the current high, the wires would get hot.

At the other end of the transmission line there is a step-down which reduces the voltage. 11000 V is used for industry, 415 V for light industry and 230 V for our .