A railway electrification system supplies electric power to railway trains and trams without an on-board prime mover or local fuel supply. Electrification has many advantages but requires significant capital expenditure. Selection of an electrification system is based on economics of energy supply, maintenance, and capital cost compared to the revenue obtained for freight and passenger traffic. Different systems are used for urban and intercity areas; some electric locomotives can switch to different supply voltages to allow flexibility in operation.

Electric railways use electric locomotives to haul passengers or freight in separate cars or electric multiple units, passenger cars with their own motors. Electricity is typically generated in large and relatively efficient generating stations, transmitted to the railway network and distributed to the trains. Some electric railways have their own dedicated generating stations and transmission lines but most purchase power from an electric utility. The railway usually provides its own distribution lines, switches and transformers.

Based on the article and the following list of answers, write a list of questions.

1. A railway electrification system
2. An on-board prime mover or local fuel supply.
3. Electric locomotives
4. No
5. Generating stations
6. Yes
7. Purchase power from an electric utility.
8. The revenue obtained for freight and passenger traffic
9. No
10. The ability to switch to different supply voltage
11. Electric power to railway trains and trams
1. What supplies electric power to railway trains and trams?
2. What does it not have?
3. What carries passengers?
4. Do they share motors?
5. Where is the power generated from?
6. Do some stations have their own?
7. What do most do though?
8. What is capital amount compared to?
9. Do urban and intercity use the same systems?
10. What allows flexibility in operations?
11. What does the railway provide?